FabSugar

eBay Find of the Week

FabSugar — Sat, 19 Jan 2008 01:23:22 -0800

Winter white coats are everywhere you turn these days, so why not contribute to the widespread trend? Do so with this Vintage Faux Fur Jacket, size M-L, because it's very '70s glam, gorgeously textured, and no one else you know will have it.

The current bidding price is at $9.99 and the auction ends on Thursday, Jan. 24. Good luck and happy bidding!

Celebrity Style: Cameron Diaz

FabSugar — Mon, 14 Jan 2008 13:00:22 -0800

After a brief hiatus, Cameron Diaz is back in the public eye. Yay! While shopping with friends in NYC, the svelte actress showed the world her new oversized Fendi bag, Francesca Romana Diana pinkie ring, and Winter-white coat. The rest of her look - the Loeffler Randall boots, skinny jeans, brown scarf - is quintessentially Cameron, and that's why we love her; she layers simple pieces and makes them Fab.

Elizabeth and James Rabbit Shrug - $995.00	Tocca camel virgin wool v-neck sweater - $108.00
Loeffler Randall MALTIDE FLAT LEATHER BOOTS - $695.00	Fendi Convertible Handbag - $1,595.00
7 For All Mankind Ribbon Edie Jean - $198.00	Portolano chocolate brown cashmere baby cable scarf - $62.00
Iwona Ludyga Design Gold Snake Earrings - $80.00	Heart Charm Bangle Set - $3.80
Rachel Leigh Green Crystal Oversized Ring - $110.00

Source

Compare & Contrast: Wearing a Winter White Coat

FabSugar — Mon, 10 Dec 2007 04:00:22 -0800

White coats are snowballing as the latest outerwear trend. They're bold, cozy, and the best foray into the season without actually having to freeze. That said, there's a right and wrong way to bundle up in them . . . the proof is in these examples of Kate Moss and Eva Longoria.

Kate Moss: Kate knows how to rock every piece of clothing she owns and a bold white coat is no exception.

Coat: Staying true to her street-chic style, she dons a fancy fur-trim coat yet makes it look casual and effortless.

Shoes: Though she's wearing a stark white coat, she knows better than to go matchy matchy with her footwear. Instead, her suede over-the-knee boots give her a rock 'n roll edge.

Accessories: Because her outerwear is loud, Kate kept the accessories to a bare minimum: a simple clutch and no jewels.

Eva Longoria: The actress opted for a long white coat to keep her fully covered.

Coat: Because she's petite, the long coat is overbearing. Still, the slight flare at the bottom and tie-waist belt lend a girly flair.

Shoes: Pairing UGGs with a classy coat took the look from potentially chic to tacky and immature. They make her legs look unnecessarily stumpy.

Accessories: Can you tell Eva loves to pile on the accessories? A white fedora, jumbo black patent bag, and a tassel - it's all too much. Less would have been way more.

Bauer-Griffin

Kate Hudson's Winter White Fur: Love It or Hate It?

FabSugar — Mon, 03 Dec 2007 15:00:22 -0800

A stark white fur coat is quite a way to make a statement when it's nippy. Kate Hudson made a bold appearance in her furry outerwear at Dolce & Gabbana's Pre-Fall 2008 Collection event. I've always thought that Kate wears cold-weather clothing really well, but this is taking it to a highly sophisticated, and dramatic, level. I heart, do you?

Source

Celebrity Style: Miley Cyrus

FabSugar — Wed, 02 Jan 2008 12:00:22 -0800

Miley Cyrus is growing up fast, and her ensemble on New Year's Eve in NYC reflects it. Billy Ray's daughter shielded herself from the cold in a chic winter white coat with oversized black buttons, a knit cap, black gloves, and black suede boots. My only complaint is that her hat and coat are slightly matchy matchy; to fix, I gave her a plaid one. Keep up the Fab work, Miley!

Soia & Kyo Wool Twill Walking Coat with Back Buckle Detail - $375.00	Eugenia Kim Muffy Oversized Plaid Equestrian Cap - $209.00
Edun Sylph Trouser Pocket in Grey Garment Dye - $185.00	Via Spiga Decorum - $350.00
Kashmere black knit detail cashmere gloves - $36.00	Textured Chandelier Earrings - $49.00

Source

Absolutely Fabulous

FabSugar — Sun, 08 Nov 2009 14:11:22 -0800

Who wore white feathery Marchesa better?
What do you think of my November most wanted?
The Jimmy Choo for H&M launch is nearing - check out the celeb-studded LA launch party.
Enter to win Rebecca Minkoff's saucy studded Devote hobo handbag.
Here are some gift suggestions for your mama, pops, nana, and dada.
Master this week's The City and Gossip Girl fashion quizzes - achieve Blair's shimmering getup.
I won't let Halloween go: see what roles Sugar people played, what the celebs wore, and play our Halloween faceoff.
We're gearing up for Winter - here are 15 cozy chic sweaters and 10 warm Winter coats you need now.
Mary-Kate and Ashley Olsen's line for JCPenney, Olsenboye, is already on sale!
Do you agree with the final Project Runway contenders?
Dig Daria Werbowy in Fall-esque gear in hay fields.

Trend Alert: Creamsicle Coats

FabSugar — Fri, 04 Jan 2008 06:00:22 -0800

I knew creamsicle coats were on the move when style-setter Kate Hudson and fashion newbie Miley Cyrus wore them. It's the dead of Winter folks, so this is the perfect antidote to post-holiday blues. The real beauty is that when gallivanting in a creamsicle coat, you can keep the rest simple and elegant. The only thing Geri Halliwell has to look out for here is dirt, and God made dirt and dirt don't hurt.

Bauer-Griffin

Fab Finding Follow-Up: FabSugar Coat Challenge

FabSugar — Wed, 28 Oct 2009 05:50:22 -0700

Fab reader Sabina Tarnowka needed our help. She recently moved to Michigan and is in dire need of a warm Winter jacket. She's on a budget, so I challenged you to find items under $200. Remember, Sabina wants snazzy, not sporty. I started you off with this EEK! by Eugenia Kim Bow Beanie ($38) for inspiration. Let's see what you all came up with!

Look #1, created by maria212134, is casual but stunning. The check coat and over-the-knee boots are divine.

To see the rest, read more.

Look #2, created by Sarahab145, is understated chic. Camel with black and white equals love.

Look #3, created by nikkeeb, has a boho touch. Those ruffle ankle boots are too cute.

Look of the Day: Sophisticated Lady

FabSugar — Mon, 06 Oct 2008 09:00:22 -0700

sandra werner is a sight to see in her black and white ensemble. I like how this sophisticated lady cleverly cinched in her textured coat with a black leather belt. This smart styling trick gives her the perfect hourglass shape. Channeling Carla Bruni-Sarkozy . . .

Here's what she has on:

Coat: Rory Beca
Handbag: Anya Hindmarch
Shoes: Gucci
Belt: Unknown

Congrats to sandra werner!

Everyone else, submit your looks and I might feature you on FabSugar!

Coronary artery disease

FitSugar — Wed, 08 Oct 2008 17:35:07 -0700

HEALTH GUIDE REFERENCE FROM A.D.A.M

Highlights

Angioplasty Versus Drugs

Angioplasty works no better than drug therapy (high blood pressure, cholesterol, anti-platelet, and other medication) in preventing heart attack and stroke in patients with stable coronary artery disease (CAD), according to an important New England Journal of Medicine study. Experts still recommend angioplasty for patients with unstable or severe CAD.

Stents

Stents coated with drugs may have a slightly higher risk of causing blood clots than bare metal stents, according to FDA meetings held in late 2006. Researchers still need to conduct more research before reaching final conclusions.
Drug-coated stents work well when they are used for patients with specific types of heart conditions, indicate several studies published in the New England Journal of Medicine. However, problems may develop when these stents are used for “off-label” purposes. Experts are also concerned that both bare metal and drug-coated stents may be used too frequently.
Patients who receive a drug-coated stent must take both aspirin and an anti-platelet thienopyridine drug (usually clopidogrel) for at least 1 year after the stent is inserted, advises an important statement from the American Heart Association. Patients who cannot take a thienopyridine drug should receive a bare metal stent instead of a drug-coated stent.

Anti-Bleeding Drugs for Coronary Artery Bypass Graft (CAGB)

Aprotinin (Trasylol), a drug used to control bleeding during CABG, is more dangerous than other types of anti-bleeding drugs, according to a 2007 study in the Journal of the American Medical Association. Many experts now recommend against its use.

Diagnosis

Blood tests for biomarkers do not provide much more predictive information than standard disease risk factors, suggest several recent studies. In a 2006 study published in the New England Journal of Medicine, researchers found that risk factors such as high blood pressure, high cholesterol, and diabetes are still the best methods for predicting the likelihood of heart disease and heart-related death.

Introduction

The heart is the human body's hardest working organ. Throughout life it continuously pumps blood enriched with oxygen and vital nutrients through a network of arteries to all parts of the body's tissues.

The external structures of the heart include the ventricles, atria, arteries, and veins. Arteries carry blood away from the heart while veins carry blood into the heart. The vessels colored blue indicate the transport of blood with relatively low content of oxygen and high content of carbon dioxide. The vessels colored red indicate the transport of blood with relatively high content of oxygen and low content of carbon dioxide.

In order to perform the difficult task of pumping blood to the rest of the body, the heart muscle itself needs a plentiful supply of oxygen-rich blood, which is provided through a network of coronary arteries. These arteries carry oxygen-rich blood to the heart's muscular walls (the myocardium).

Click the icon to see an image of the anterior heart arteries.

If blood flow to the myocardium is interrupted, an injury known as an infarct occurs. This is also known as myocardial infarction or, more commonly, a heart attack.

Click the icon to see an animation about coronary artery disease.

Coronary artery disease is the end result of a complex process called atherosclerosis (commonly called "hardening of the arteries"). This causes blockage of arteries (ischemia ) and prevents oxygen-rich blood from reaching the heart. There are many steps in the process leading to atherosclerosis, some not fully understood.

Click the icon to see an image of atherosclerosis.

Increasingly, however, researchers are studying the interactions between cholesterol and processes known as oxidation and the inflammatory response.

Cholesterol and Lipoproteins. The story begins with cholesterol and sphere-shaped bodies called lipoproteins that transport cholesterol.

Cholesterol is a white, crystalline substance that is found in all animal cells and in animal-based foods. It is critical for many functions, but under certain conditions cholesterol can have harmful effects.
The lipoproteins that transport cholesterol are referred to by their size. The most commonly known are low-density lipoproteins (LDL) and high density lipoproteins (HDL). LDL is often referred to as the "bad" cholesterol and HDL as the "good" cholesterol.

Click the icon to see an image of cholesterol inside an artery.

Oxidation. The damaging process called oxidation is an important trigger in the atherosclerosis story.

Oxidation is a chemical process in the body caused by the release of unstable particles known as oxygen-free radicals. It is one of the normal processes in the body, but under certain conditions (such as exposure to cigarette smoke or other environment stresses) these free radicals are overproduced.
In excess amounts, they can be very dangerous, causing damaging inflammation and even affecting genetic material in cells.
In heart disease, free radicals are released in artery linings and oxidize low-density lipoproteins (LDL). The oxidized LDL is the basis for cholesterol build-up on the artery walls and damage leading to heart disease.

Inflammatory Response. For the arteries to harden there must be a persistent reaction in the body that causes ongoing harm. Researchers now believe that this reaction is an immune process known as the inflammatory response. The following is one theory about how the inflammatory response contributes to heart disease:

The injuries to the arteries during oxidation signal the immune system to release white blood cells (particularly those called neutrophils and macrophages) at the site. These factors initiate the inflammatory response.
Macrophages literally "eat" foreign debris, in this case oxidized LDL cholesterol.
The process converts LDL cholesterol into foamy material that attaches to the smooth muscle cells of the arteries. The cholesterol becomes mushy and accumulates on artery walls.
Over time the cholesterol dries and forms a hard plaque, which causes further injury to the walls of the arteries.
In response to this additional harm, the immune system releases other factors called cytokines. These are powerful inflammatory molecules that attract more white blood cells and perpetuate the whole cycle, causing persistent injury to the arteries.

Click the icon to see an image of atherosclerosis.

Evidence is growing that the inflammatory response may be present not only in local plaques in single arteries but also throughout the arteries leading to the heart.

Blockage in the Arteries. Eventually these calcified (hardened) arteries become narrower (a condition known as stenosis).

As this narrowing and hardening process continues, blood flow slows and prevents sufficient oxygen-rich blood from reaching the heart.
Such oxygen deprivation in vital cells is called ischemia. When it affects the coronary arteries, it causes injury to the tissues of the heart.
Injured inner vessel walls also fail to produce enough nitric oxide, a substance critical for maintaining blood vessel elasticity. (Nitric oxide has complex effects and may increase inflammation in the arteries.)
These narrow and inelastic arteries not only slow down blood flow but also become vulnerable to injury and tears.

Click the icon to see an image of coronary artery blockage

The End Result: Heart Attack. Heart attack can occur as a result of one or two effects of atherosclerosis.

(1) If the artery becomes completely blocked and ischemia becomes so extensive that oxygen-bearing tissues around the heart die.

(2) If the plaque itself develops fissures or tears. Blood platelets adhere to the site to seal off the plaque, and a blood clot (thrombus) forms. A heart attack can then occur if the formed blood clot completely blocks the passage of oxygen-rich blood to the heart.

Click the icon to see an image of the developmental process of atherosclerosis.

Angina is the primary symptom of coronary artery disease and, in severe cases, of a heart attack. It is typically experienced as chest pain and occurs when the heart muscle does not get as much blood (hence as much oxygen) as it needs for a given level of work (ischemia). Angina is usually referred to as one of two states:

Click the icon to see an image about angina.

Stable Angina (which is predictable)
Unstable Angina (which is less predictable and a sign of a more serious situation)

Angina itself is not a disease. Much evidence indicates that onset of angina less than 48 hours before a heart attack may be protective, possibly by conditioning the heart to resist the damage resulting from the attack. Angina may be experienced in different ways and can be mild, moderate, or severe.

Click the icon to see an image of angina.

Specific factors are typically considered in determining whether symptoms indicate angina:

Quality of the pain. Angina pain is typically described by patients as squeezing, heavy, suffocating, or griplike. It is rarely described as stabbing or burning. Changing one's position or breathing in and out does not affect the pain. The intensity of the pain does not always relate to the severity of the medical problem. Some people may feel a crushing pain from mild ischemia, while others might experience only mild discomfort from severe ischemia. In some cases, the patient experiences shortness of breath, fatigue, or palpitations instead of pain. In others, the ischemia is entirely asymptomatic ("silent ischemia").
Duration. A typical angina attack lasts minutes. If it is more fleeting or lasts for hours, it is probably not angina.
Location. Pain is usually in the chest under the breast bone. It often radiates to the neck, jaw, or left shoulder and arm. Less commonly, patients report symptoms that radiate to the right arm or back.
Triggers of Angina. Angina is usually triggered by physical exertion, emotional stress, or exposure to cold.
Factors that Relieve Angina. Angina is usually relieved by rest or by taking nitroglycerine under the tongue.

Stable Angina. Stable angina is predictable chest pain. Although less serious than unstable angina, it can be extremely painful. It is usually relieved by rest and responds well to medical treatment (typically nitroglycerin). Any event that increases oxygen demand can cause an angina attack. Some typical triggers include:

Exercise
Cold weather
Emotional tension
Large meals

Angina attacks can occur at any time during the day, but most occur between 6 a.m. and noon.

Unstable Angina and Acute Coronary Syndrome. Unstable angina is a much more serious situation and is often an intermediate stage between stable angina and a heart attack, in which an artery leading to the heart (a coronary artery) becomes completely blocked. A patient is usually diagnosed with unstable angina under one or more of the following conditions:

Pain awakens a patient or occurs during rest.
A patient who has never experienced angina has severe or moderate pain during mild exertion (walking two level blocks or climbing one flight of stairs).
Stable angina has progressed in severity and frequency within a 2-month period, and medications are less effective in relieving its pain.

Unstable angina is now usually discussed as part of a condition called acute coronary syndrome (ACS). ACS also includes people with a condition called NSTEMI (non ST-segment elevation myocardial infarction) -- also referred to as non-Q wave heart attack. With NSTEMI, the blood tests suggest a developing heart attack. These conditions are less severe than heart attacks but may develop into full-blown attacks without aggressive treatment. [See In-Depth Report #12: Heart attack and acute coronary syndrome.]

Prinzmetal's Angina. A third type of angina, called variant or Prinzmetal's angina, is caused by a spasm of a coronary artery. It almost always occurs when the patient is at rest. About two-thirds of people with it have severe atherosclerosis in at least one major blood vessel. Irregular heartbeats are common, but the pain is generally relieved immediately with standard treatment.

Click the icon to see an image of a coronary artery spasm.

Silent Ischemia. Some people with severe coronary artery disease do not experience angina pain. This condition is known as silent ischemia, which some experts attribute to abnormal processing of heart pain by the brain. This is a dangerous condition because patients have no warning signs of heart disease. Some studies suggest that people with silent ischemia experience higher complication and mortality rates than those with angina pain. (Angina pain may actually protect the heart by conditioning it before a heart attack.)

Syndrome X. Syndrome X is a condition that occurs when patients have atypical angina chest pain. Their electrocardiograms are abnormal during a stress test, but they have no signs of blocked arteries. It is more likely to occur in women. Although it unclear what causes this condition, imaging tests suggest that Syndrome X may also be caused by ischemia, as is angina.

Prognosis

According to a 2007 report, nearly 16 million Americans have coronary artery disease. In the U.S., coronary artery disease is the leading killer of both men and women. In 2004, nearly 500,000 people died because of CAD. On the positive side, heart attack mortality rates have been declining. Half of men and 63% of women who die of heart disease do not have angina or other warning symptoms prior to their fatal attacks. Although at this time no tests can reliably predict whether a heart attack will occur, experts estimate that up to 30% of fatal attacks and many follow-up surgeries could be avoided with healthy lifestyle changes and by sticking to medical treatments. Two-thirds of patients who have suffered a first heart attack, however, do not take the necessary steps to prevent another.

The following syndromes suggest different degrees of severity among patients with heart disease.

Stable Angina. This condition can usually be managed with lifestyle measures and medications, such as low-dose aspirin. The more severe the angina, however, the greater the chance for progressing to a more serious condition.

Acute Coronary Syndromes (ACS). ACS includes severe and sudden heart conditions that require aggressive treatment but have not developed into a full-blown heart attack. ACS refers to either unstable angina or NSTEMI (non ST-segment elevation myocardial infarction). NSTEMI is also known as non Q-wave myocardial infarction.

Angina is a specific type of pain in the chest caused by inadequate blood flow through the blood vessels (coronary vessels) of the heart muscle (myocardium).

Unstable angina is potentially serious and chest pain is persistent, but blood tests do not show markers for heart attack.
With NSTEMI, the blood tests suggest a developing heart attack, but, most likely, injury in the arteries is less serious than with a full-blown heart attack.

Most discussions of the treatment of unstable angina now refer to acute coronary syndrome. Doctors use the presence of a number of factors to help predict which ACS patients are most at risk for developing a heart attack.

First, patients are categorized by whether they have a history of heart disease or risk factors for heart disease (such as diabetes, high blood pressure, peripheral artery disease) or other complicating conditions (such as lung disease, heart failure). The doctor also evaluates the severity of the angina. Other factors that pose a high risk for ACS include:

Age 65 years or older
Evidence of severe heart tissue injury
Having a lighter weight
Having a history of severe chronic angina
Having abnormal lung sounds called rales (a bubbling or crackling sound) on examination
ST-segment deviation
Having either very slow or very fast heat beats
Having very low blood pressure

Heart Attack. A full-blown heart attack occurs with severe damage to the heart, which blocks oxygen.

ANYONE WHO BELIEVES THEY ARE HAVING A HEART ATTACK SHOULD IMMEDIATELY CALL THE EMERGENCY MEDICAL SYSTEM (911 IN THE UNITED STATES).

People with known heart disease and any unusual chest pain or other symptoms of heart attack that do not clear up with medications should go to the hospital. The degree of pain and the specific symptoms before a heart attack vary greatly among individuals. Symptoms can be abrupt, gradual, or intermittent.

Chest Pain. People with heart disease or risk factors should be concerned about any chest pain, usually precipitated by exercise or stress, that interrupts normal activities and does not clear up after resting or taking angina medications. Chest symptoms might be experienced as follows:

Pain is typically felt as a crushing weight against the chest, accompanied by profuse sweating. The pain may radiate to the left shoulder and arm, the neck or jaw, and even infrequently to the right arm. The arm may be tingling or numb.
Some people may have only a tingling sensation or a sense of fullness, squeezing, or pressure in the chest.
In some patients with a history of heart disease, chest pain is mild. Such patients may have experienced unexplained fatigue, depression, and ill health within a month of a heart attack. Although chest pain is the classic symptom, it occurs in only about half of patients with a heart attack.

Other Common Symptoms.

Nausea, vomiting, and cold sweats
A feeling of indigestion or heartburn
Fainting
A great fear of impending death, a phenomena known as angor animi

Atypical Symptoms. Some studies suggest that nearly half of patients with heart attack do not have chest pain as the primary symptom. Common atypical symptoms of a heart attack include:

Shortness of breath
Cardiac arrest
Dizziness, weakness, and fainting
Abdominal pain

Patients most likely to have atypical symptoms are women and the very elderly (although they can certainly have classic heart attack symptoms as well).

In one study, 52% of elderly people with acute coronary syndrome had atypical symptoms that included shortness of breath, nausea, profuse sweating, pain in the arms, and fainting. Such symptoms were more likely to occur in people with personal or family history of heart disease.
Before a heart attack, women are more likely than men to be nauseous and experience pain high in the abdomen or chest. Their first symptom may be extreme fatigue after physical activity rather than chest pain. Chest pain in women is also more likely to be caused by non-heart problems than in men.

Symptoms That Are Less Likely to Indicate a Heart Attack. The following symptoms are less likely to be due to a heart attack:

Sharp pain brought on by lung movements or coughing
Pain that is mainly or only in the middle or lower abdomen
Pain that can be pinpointed with the top of one finger
Pain that can be reproduced by moving or pressing on the chest wall or arms
Pain that is constant and lasts for hours (although no one should wait hours if they suspect they are having a heart attack)
Pain that is very brief and lasts for a few seconds
Pain that spreads to the legs

However, the presence of these symptoms does not always rule out a serious heart event.

Chest pain is a very common symptom in the emergency room, but heart problems account for only 10 - 33% of all episodes.

The most common causes of chest pain are muscular and bone problems. Problems affecting the ribs and chest muscles include injured muscles, fractures, arthritis, spasms, and infections.

Other causes of chest pain include:

Anxiety attacks
Gastrointestinal disorders (gallstone attacks, peptic ulcer disease, hiatal hernia, heartburn)
Asthma
Spasm in the coronary artery
Abnormalities of the heart muscle
Rupture of the aorta
Collapsed lung
Acute inflammation of the heart
Blood clot in the lung
High thyroid levels (hyperthyroidism)
Anemia
Vasculitis (a group of disorders that cause inflammation of the blood vessels)
Exposure to high altitudes (rare)

Individuals who experience symptoms of a heart attack should take the following actions:

For angina patients, take one nitroglycerin dose either as an under-the-tongue tablet or in spray form at the onset of symptoms. Take another dose every 5 minutes up to three doses or when the pain is relieved, whichever comes first.
Call 911 or the local emergency number. This should be the first action taken if angina patients continue to experience chest pain after taking the full three doses of nitroglycerin. However, only 20% of heart attacks occur in patients with long-standing angina. Therefore, anyone who has heart disease or risk factors for it and experiences heart attack symptoms should contact emergency services.
The patient should chew an aspirin (250 - 500 mg) and be sure that emergency health providers are informed of this so an additional dose is not given.
Patients with chest pain should go immediately to the nearest emergency room, preferably traveling by ambulance. They should not drive themselves.

Click the icon to see an image about heart attack symptoms.

Click the icon to see another image about heart attack symptoms.

Risk Factors

Over 13 million Americans have had angina, a heart attack, or both. Each year, about 1.2 million people will experience a serious heart event. About 25% of all Americans have one or more risk factors for heart disease. Most risk factors for heart disease are related to lifestyle and environmental factors.

Over the past decades, heart disease rates declined in both men and women as they quit smoking and improved dietary habits. This rate, however, has stabilized in recent years, most likely because of the dramatic increase in obesity in the U.S. and other industrialized nations. There have also been minimal changes in other risk factors, including smoking, sedentary behavior, and blood pressure control. Some risk factors cannot be changed, including age, gender, and genetics. Nevertheless, their effects can still be modified with healthy lifestyle changes.

Heart disease may be prevented with a healthy diet and regular exercise, and by quitting smoking if you smoke. Follow your health care provider's recommendations for the treatment and prevention of heart disease.

The American Heart Association guidelines for preventing heart disease recommend:

Improve Cholesterol. People with at least two risk factors and a 10-year risk for heart disease or stroke of more than 20% should aim for LDL levels of less than 100 mg/dl. Statins are now used in more cases.

Keep Blood Pressure Low. People in normal health should have a blood pressure reading of 120/80 mm Hg or less. According to the latest guidelines, blood pressure readings of 120/80 are considered normal, readings of 140/90 or higher indicate hypertension, and readings in between the two are called pre-hypertension. Patients with diabetes or chronic kidney disease should maintain blood pressure readings of 130/80 mm Hg or less, while others should be no higher than 140/90 mm Hg.

Exercise. Everyone in normal health should engage in at least moderate physical activity for a minimum of 30 minutes on most, if not all, days of the week.

Healthy Diet. Everyone should aim for a diet that contains a healthy balance of fruits, vegetables, grains, fish, nuts, legumes, poultry, lean meat, and low-fat dairy items. Avoid saturated fats and trans-fatty acids.

Quit Smoking. Also avoid exposure to secondhand smoke.

Maintain Weight. People should aim for a BMI index of 18.5 - 24.9.

Taking Aspirin. People whose risk for heart disease within 10 years is 10% or more should take a low-dose aspirin every day, unless they have medical reasons to avoid aspirin.

Control Diabetes. People with diabetes should aim for fast blood glucose levels of less than 110 mg/dl and hemoglobin A1C or less than 7%.

Control Atrial Fibrillation. People with atrial fibrillation should use anticoagulants to reduce the risk for blood clots.

Age. About 85% of people who die from heart disease are over the age of 65.

Gender. Coronary artery disease and heart attacks are much more common in middle-aged men. Women have, on average, 10 - 15 more years of heart disease-free life than do men, but as women age, they catch up to men. Women, in fact, are more likely to have angina than men. Younger women with heart disease often do not have the same symptoms as their male counterparts and may be less likely to be diagnosed correctly. They are also more likely than men to die after a heart attack.

In 2007, the American Heart Association issued updated guidelines focusing on prevention of heart disease in women. The new guidelines recommend:

Healthy diet (fresh fruits and vegetables, low-fat dairy products, salt and saturated fat restrictions, alcohol moderation)
Eating oily fish (such as salmon) at least twice a week. Women with existing heart disease should consider taking fish oil supplements of 850 – 1,000 mg eicosapentaenoic acid (EPA) and docosahexaenoic acid (DPA).
Increased physical activity (60 – 90 minutes, preferably 7 days a week)
Quitting smoking
Low-dose aspirin therapy for all women age 65 years and older who can safely take aspirin. High-risk women may require 75 – 325 mg / day; lower-risk women may benefit from 81 mg a day or 100 mg every other day.

Genetic Factors. Genetics are involved in increasing the likelihood of developing important risk factors such as diabetes and high blood pressure. For example, one genetic variant called apolipoprotein E4 (ApoE4) affects cholesterol levels, particularly those associated with heart disease.

Ethnicity. African-American women face the highest risk for death from heart disease, and their rate of heart attacks is increasing. (Mortality rates in men do not differ much by race.) Native American men have a lower risk for heart disease than Caucasian men, and Hispanics have the lowest risk for heart disease of all major American population groups.

African-Americans face a number of biologic and social dangers to their hearts.

They have a higher prevalence of diabetes and hypertension than do Caucasians.
They tend to have poorer diets, higher stress levels, and less access to health care.
All African-Americans risk discrimination in obtaining optimal treatments, but women may be at particular risk for unequal treatment. In one study in which female actors portrayed heart patients, African-American women were 60% less likely to receive aggressive (and expensive) diagnostic tests than African-American men or any Caucasians, even though they presented with similar symptoms.
While African-Americans comprise 13% of the U.S. population, African-Americans have comprised only 2 - 9% of subjects in most major research trials, so knowledge about their specific risks is limited.
Some African-Americans with coronary artery disease appear to have a genetic trait that increases the danger of triglycerides, which may be particularly hazardous for women.

Click the icon to see an image about ethnicity and heart disease risks.

Cholesterol. In spite of its bad press, cholesterol is an essential nutrient necessary for many cellular functions. However, when certain cholesterol levels rise in the blood, they can have dangerous consequences, depending on the type of cholesterol. Low-density lipoprotein (LDL) cholesterol is the "bad" cholesterol responsible for many heart problems. Triglycerides are another type of lipid (fat molecule) that can be bad for the heart. High-density lipoprotein (HDL) cholesterol is the "good" cholesterol that helps protect against heart disease. Doctors test for a "total cholesterol" profile that includes measurements for LDL, HDL, and triglycerides. The ratio of these lipids can affect heart disease risk.

For example, according to one study, men with total cholesterol levels over 240 mg/dl have a risk that is two to four times higher than men whose cholesterol is below 200. A number of studies have demonstrated that reducing LDL and total cholesterol levels and boosting high-density lipoprotein (HDL) levels can improve survival and prevent heart attacks in people with and without heart disease.

It is very difficult to measure LDL levels by themselves, but LDL levels can be reliably calculated by the Friedewald formula: LDL=TC-HDL-TG/5. (LDL=low-density lipoprotein; TC= total cholesterol; HDL=high-density lipoprotein; TG=triglycerides.)

Click the icon to see an image about serum cholesterol.

Cholesterol Goals. In 2004, the National Cholesterol Education Program updated its clinical practice guidelines. The new recommendations set lower treatment goals for LDL levels based on a patient's risk factors for heart disease.

These risk factors include:

Having a first-degree female relative diagnosed with heart disease before age 65 or a first-degree male relative diagnosed before age 55
Being male and over age 45 or female and over age 55
Cigarette smoking
Diabetes
High blood pressure
Metabolic syndrome (risk factors associated with obesity such as low HDL levels and high triglycerides

Having two or more of these risk factors indicates a greater than 20% chance of having a heart attack within 10 years.


Risk Level	Goal (d/L)	Optimal Goal(d/L)
Very High Risk	70	70
High Risk	100	70
Moderate Risk	130	100
Low Risk	160	130

LDL cholesterol, together with other risk factors for heart disease, is the best determinant for whether cholesterol therapy is needed and whether it is working properly. In particular, the new guidelines emphasize lower LDL levels and earlier treatment for people with coronary artery disease, or other forms of atherosclerosis, and diabetes.


Total Cholesterol Goals	LDL Goals	HDL Goals	Triglyceride Goals
Less than 200 mg/dL is desirable. Between 200 and 239 is borderline. Over 240 is high.	70 mg/dL or less is the new goal for very high-risk patients (recent heart attack; current active or unstable cardiovascular or cerebrovascular disease; or two multiple risk factors as defined above.) Below 100 mg/dl is optimal for everyone. It should be the goal for high-risk people including those with existing heart disease, diabetes, or two or more risk factors for heart disease; 70 mg/dL is an optimal goal for these individuals. 130 mg/dl or below for people with two or more risk factors; 100 mg/dL is the optimal goal. 160 mg/dl or less for people at less risk (one or zero risk factors); 130 mg/dL is the optimal goal. Anything over 160 is high with levels over 190 being very high. LDL levels over 190 require medication even with no other cardiac risk factors present.	Levels above 40 mg/dL are desirable; levels above 60 mg/DL are optimal.	Below 150 mg/dL is normal. 150-199 is borderline high. 200-499 is high. Over 500 is very high.
*Risk factors for heart disease include a family history of early heart problems before age 55 for men, before age 65 for women, smoking, high blood pressure, diabetes, being older (over 45 for men and 55 for women), and having HDL levels below 35 mg/dl. People with two or more of these risk factors may have a 10-year risk of heart attack that exceeds 20%, and may therefore need to aim for LDL levels of 100 mg/dL or below.

Other Lipids. Elevated levels of other fatty molecules (lipids) are also now thought to be important indicators of heart disease risk. Studies are finding an elevated risk for angina and first heart attacks in people with elevated levels of lipoprotein(a), or lp(a). This lipoprotein falls somewhere in density between HDL and LDL and may have some properties that increase the risk for blood clots. Some experts suggest, however, that high levels of lp(a) may merely be markers of late-stage atherosclerosis, not a cause.

[See In-Depth Report #23: Cholesterol; and In-Depth Report #43: Heart-healthy diet.]

High blood pressure, or hypertension, has long been a proven cause of coronary artery disease. Blood pressure is categorized as normal, prehypertensive, and hypertensive (which is further divided as Stage 1 or 2 according to severity). High blood pressure is generally considered to be a blood pressure reading greater than or equal to 140 mm Hg (systolic) or greater than or equal to 90 mm Hg (diastolic). Blood pressure readings in the prehypertension category (120 - 139 systolic or 80 - 89 diastolic) indicate an increased risk for developing hypertension. [See Table Blood Pressure Ranges.]

A normal blood pressure reading is 120/80 mm Hg or lower. Most people with high blood pressure should aim for a goal of below 140/90 mm Hg. Patients with certain health problems should aim lower (blood pressure in patients with kidney disease, heart failure, or diabetes should be equal to or lower than 130/80 mm Hg.)

Click the icon to see an image about hypertension.


Blood Pressure Category	Ranges for Most Adults (systolic/diastolic)
Normal Blood Pressure (systolic/diastolic)	Systolic below 120 mm Hg Diastolic below 80 mm Hg
Prehypertension (Formerly Classified as Normal to High-Normal Blood Pressure)	Systolic 120 to 139 mm Hg Diastolic 80 to 89 mm Hg (NOTE: 139/89 or below should be the minimum goal for everyone. People with diabetes or chronic kidney disease should strive for 130/80 or less.)
Mild Hypertension (Stage 1)	Systolic 140 to 159 mm Hg Diastolic 90 to 99 mm Hg
Moderate-to-Severe Hypertension (Stage 2)	Systolic over 160 mm Hg and/or Diastolic over 100 mm Hg
Note: If one of the measurements is in a higher category than the other, the higher measurement is usually used to determine the stage. For example, if systolic pressure is 165 (Stage 2) and diastolic is 92 (Stage 1), the patient would still be diagnosed with Stage 2 hypertension. A high systolic pressure should be a major focus of concern in most adults.

American obesity is at epidemic levels in all age groups. The effect of obesity on cholesterol levels is complex. Although obesity does not appear to be strongly associated with overall cholesterol levels, among obese individuals triglyceride levels are usually high while HDL (beneficial cholesterol) levels tend to be low, both risk factors for heart disease. Obesity has other effects (hypertension, increase in inflammation) that pose major risks to the heart.

Click the icon to see an image of childhood obesity.

Obesity is particularly hazardous when it is one of the components of the metabolic syndrome. This syndrome is diagnosed when three of the following are present: abdominal obesity, low HDL cholesterol, high triglyceride levels, high blood pressure, and insulin resistance. Metabolic syndrome is a pre-diabetic condition that is significantly associated with heart disease and higher mortality rates from all causes. A 2002 study estimated that 24% of the population now has this condition. Obesity is highly linked with type 2 diabetes, and diabetes itself poses a significant risk for high cholesterol levels and heart disease.

Some obese patients with coronary artery disease may consider having bariatric surgery (stomach bypass) to lose excess weight. The weight lost after surgery can help improve blood pressure, cholesterol, blood sugar and other factors associated with CAD. A 2005 study reported that bariatric surgery is safe for patients with CAD who cannot lose weight with diet and exercise, which should always be tried first.

[See In-Depth Report #53: Weight control and diet.]

People who are sedentary are almost twice as likely to suffer heart attacks as are people who exercise regularly. Exercise has a number of effects that benefit the heart and circulation, including:

Improving cholesterol and lipid levels
Reducing inflammation in the arteries
Assisting weight loss programs
Helping to keep blood vessels flexible and open

Studies continue to show that physical activity and avoiding high-fat foods are the two most successful means of reaching and maintaining heart healthy levels of fitness and weight.

Experts have been attempting to define how much exercise is needed to produce heart benefits. In 2002, a well-conducted study on overweight adults confirmed previous research that reported beneficial changes in cholesterol and lipid levels even when people performed low amounts of moderate or high intensity exercise (walking or jogging 12 miles a week). However, more intense exercise is required to significantly change cholesterol levels, notably by increasing HDL (the so-called good cholesterol). Overweight people who have trouble losing pounds can still achieve considerable heart benefits by exercising. Resistance (weight) training has also been associated with heart protection. Exercises that train and strengthen the chest muscles may prove to be very important for patients with angina.

Click the icon to see an image about exercise.

Click the icon to see an image about hypertension and lifestyle changes.

Some studies suggest that for the greatest heart protection, it is not the duration of a single exercise session that counts but the total daily amount of energy expended. Therefore, the best way to exercise may be in multiple short bouts of intense exercise, which can be particularly helpful for older people.

Sudden strenuous exercise (such as snow shoveling and mowing lawns) puts many people at risk for angina and heart attack. Activities that involve raising the arms above the head may also be risky. Patients with angina should never exercise shortly after eating. People with risk factors for heart disease should seek medical clearance and a detailed exercise prescription. And all people, including healthy individuals, should listen carefully to their bodies for signs of distress as they exercise. [See In-Depth Report #29: Exercise.]

Heart disease and stroke are the leading causes of death in people with diabetes. People with diabetes are at risk for the following heart-risk conditions, and the more of these conditions they have, the worse the outlook.

High blood pressure (hypertension). Up to 75% of cardiovascular problems in people with diabetes may be due to hypertension.
Very unhealthy cholesterol and lipid balances (high triglyceride levels and lower HDL).
Blood clotting problems.
Impaired nerve function (neuropathy), which can also damage the heart. Some experts estimate that the mortality rates from neuropathy-related heart conditions range from 15 - 53%.

People with both diabetes and heart disease may have a higher risk for silent ischemia, a condition in which people have blocked arteries but do not experience the angina, the chest pain that signals heart disease. [See In-Depth Report #9: Diabetes - type 1; or In-Depth Report #60: Diabetes - type 2.]

Peripheral artery disease (PAD) occurs when atherosclerosis affects the extremities, particularly the feet and legs. The major risk factors for heart disease and stroke are also the most important risk factors for PAD. (The combination of such conditions with PAD also produces more severe forms of heart or circulatory disease.) Although signs of heart disease are detected in only 20 - 40% of patients with PAD after an initial diagnosis, studies suggest that when intense heart-diagnostics tests are performed, such as angiography or thallium stress tests, co-existing heart disease is detected in up to 90% of all PAD patients. [See In-Depth Report #102: Peripheral artery disease.]

Smokers in their 30s and 40s have a heart-attack rate that is five times higher than their nonsmoking peers. Cigarette smoking may be directly responsible for at least 20% of all deaths from heart disease, or about 120,000 deaths annually. Smoking cigars may increase the risk of early death from heart disease, although evidence is much stronger for cigarette smoking. Although heavy cigarette smokers are at greatest risk, a 2002 study suggested that people who smoke as few as three cigarettes a day are at higher risk for blood vessel abnormalities that endanger the heart. Regular exposure to passive smoke also increases the risk of heart disease in nonsmokers. [See In-Depth Report #41: Smoking.]

Eating habits can be protective or dangerous to the heart. Avoiding saturated fats and trans-fatty acids is particularly important for controlling cholesterol.

Diet plays an important role in the health of the heart. In 2006, the American Heart Association (AHA) issued revised diet and lifestyle recommendations. The current guidelines recommend:

Balance calorie intake and physical activity to achieve or maintain a healthy body weight. (Controlling weight, quitting smoking, and exercising regularly are essential companions of any diet program. Try to get at least 30 minutes, and preferably 60 – 90 minutes, of daily exercise.)
Consume a diet rich in a variety of vegetables and fruits. Vegetables and fruits that are deeply colored (spinach, carrots, peaches, berries) are especially recommended as they have the highest micronutrient content.
Choose whole-grain, high-fiber foods. These include fruits, vegetables, and legumes (beans). Good whole grain choices include whole wheat, oats/oatmeal, rye, barley, brown rice, buckwheat, bulgur, millet, and quinoa.
Consume fish, especially oily fish, at least twice a week (about 8 ounces/week). Oily fish such as salmon, mackerel, and sardines are rich in the omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Consumption of these fatty acids is linked to reduced risk of sudden death and death from coronary artery disease.
Limit daily intake of saturated fat (found mostly in animal products) to less than 7% of total calories, trans fat (found in hydrogenated fats, commercially baked products, and many fast foods) to less than 1% of total calories, and cholesterol (found in eggs, dairy products, meat, poultry, fish, shellfish) to less than 300 mg per day. Choose lean meats and vegetable alternatives (such as soy). Select fat-free and low-fat dairy products. Grill, bake, or broil fish, meat, and skinless poultry.
Use little or no salt in your foods. Reducing salt can lower blood pressure and decrease the risk of heart disease and heart failure.
Cut down on beverages and foods that contain added sugars (corn syrups, sucrose, glucose, fructose, maltrose, dextrose, concentrated fruit juice, honey.)
If you consume alcohol, do so in moderation. The AHA recommends limiting alcohol to no more than 2 drinks per day for men and 1 drink per day for women.

[See In-Depth Report #43: Heart-healthy diet.]

Stress. The effects of mental stress on heart disease are controversial. Stress can affect the heart when it activates the sympathetic nervous system (the automatic part of the nervous system that affects many organs, including the heart). Some studies suggest an association between acute stress and a higher risk for serious cardiac events, such as heart rhythm abnormalities and heart attacks, in people with heart disease. However, not all studies report strong evidence that stress has any effect on the heart, particularly in people without any history of heart disease. [See In-Depth Report #31: Stress.]

Depression. Depression increases the severity of heart attack and may even worsen a patient's response to medication for heart disease. Although people with heart disease may become depressed, this does not explain entirely the link between the two problems. Data suggest that depression itself may be a risk factor for heart disease as well as its increased severity.

A number of studies indicate that depression has biologic effects on the heart, including blood clotting and heart rate. One study, for example, reported an association between depression and a greater risk for death from heart problems even in people without a history of heart disease. Even mild depression, which includes feelings of hopelessness experienced over many years, may harm the heart. A 2007 study suggested that depressive symptoms (fatigue, loss of appetite) may be a sign of thickening arteries, the early stage of coronary artery disease. [See In-Depth Report #8: Depression.]

Benefits of Moderate Drinking. Several studies have found heart protection from moderate intake of alcohol (one or two glasses a day). Moderate alcohol consumption can help boost HDL levels. Alcohol may also prevent blood clots and inflammation. Although red wine is most often cited for healthful properties, any type of alcoholic beverage appears to have similar benefit.

Adverse Effects of Heavy Drinking. By contrast, heavy drinking harms the heart. In fact, heart disease is the leading cause of death in alcoholics. Evidence suggests that people who consume more than three drinks a day have abnormal blood clotting factors. Heavy alcohol consumption can raise blood pressure, and binge drinking may increase the risk for hemorrhagic stroke (caused by bleeding in the brain). Large doses of alcohol can trigger irregular heartbeats, which can be dangerous in people with existing heart disease.

Pregnant women and people who can't drink moderately should not drink at all.

Homocysteine and Vitamin B Deficiencies. Deficiencies in the B vitamins folate (known also as folic acid), B6, and B12 have been associated with a higher risk for heart disease in some studies. Such deficiencies produce higher blood levels of homocysteine, an amino acid that has been associated with a higher risk for heart disease, stroke, and heart failure. Researchers have been studying whether vitamin B supplements can reduce homocysteine levels and, consequently, heart disease risks.

Several major 2006 studies indicated that while B vitamin supplements do help lower homocysteine levels, they have no effect on heart disease outcomes. The studies, published in the New England Journal of Medicine, examined patients who had either recently had a heart attack or suffered from diabetes or heart disease. Results showed a similar number of heart attacks and strokes among patients who took B vitamins and those who received placebo. Some experts think that homocysteine may be a marker for heart disease rather than a cause of it.

Click the icon to see the benefits of vitamin B.

Click the icon to see the food sources of vitamin B.

C-Reactive Protein. C-reactive protein is a product of the inflammatory process. Evidence increasingly suggests that high levels may predict future heart disease. It is not known if the protein plays any causal role or whether it is simply a marker for other factors in the disease process.

C. pneumoniae and Other Infectious Organisms. Some microorganisms and viruses have been under suspicion for triggering the inflammation and damage in the arteries that contribute to heart disease. The strongest evidence to date supports a possible role from Chlamydia (C.) pneumoniae (a non-bacterial organism that causes mild pneumonia in young adults). C. pneumoniae has been detected in plaques in the arteries of patients with heart disease. In some studies, evidence of previous infection has been associated with a higher risk for heart events.

Other studies also suggest that cytomegalovirus (CMV), a common virus, may have similar effects. Many people, however, have been infected with these organisms, and no clear association has been found with any of these infections.(H. pylori, the bacteria that causes peptic ulcers, has also been studied for heart effects, but evidence is very weak on any link.)

Erectile Dysfunction. Recent research suggests that erectile dysfunction may be a warning sign of coronary artery disease, even in men who are not considered at risk for the condition. Some studies indicate that men with erectile dysfunction have higher levels of C-reactive protein and more symptoms of atherosclerosis than men without erectile problems.

Periodontal Disease. A number of studies support an association between periodontal disease and cardiovascular disorders. According to a 2003 major analysis, periodontal (gum) disease is associated with a 20% higher risk for ischemic stroke and heart disease. (The added risk may be even higher in adults under 65.) Recent evidence is pointing to the inflammatory response as the common element.

Click the icon to see an image of gum disease.

Anemia. Anemia has adverse effects on the heart and increases the severity of cardiac conditions, including heart failure and heart attacks. A 2002 study suggested that anemia may even be a risk factor for heart disease itself. Blood transfusions after a heart attack improve survival rates in elderly patients who are anemic.

Iron Overload. An inherited disease called hemochromatosis, in which the intestinal tract absorbs too much iron from food, has been associated with atherosclerosis and heart attack. About 10% of Caucasians carry the gene for this condition. There is no strong evidence that excess iron levels in people without hemochromatosis can contribute to heart disease.

Sleep Apnea. Obstructive sleep apnea is a condition in which tissues in the upper throat collapse at intervals during sleep, thereby blocking the passage of air. It has been strongly associated with high blood pressure and obesity, but is also associated with heart disease and heart attacks, regardless of these risk factors. Some evidence suggests that obstructive apneas cause an increase in stiffness and inflammation in the arteries.

Some inborn or natural conditions are not risk factors themselves but have been associated with a higher incidence of heart disease or its consequences:

Factors Before Birth and In Infancy. Low weight at birth and in the womb has been associated with later heart disease in a few studies. Some suggest, however, that this may just reflect poor nutrition in the mother, which appears to affect life-long risk.

Seasonal Differences. More deaths from heart disease occur in December and January, and the fewest in the summertime. Although lower temperatures and snow shoveling may play a role in some cases, more winter deaths have been reported even in warm regions. Holiday stress or fewer daylight hours have been suggested as other reasons for these higher winter rates.

Physical Characteristics. Male pattern baldness, hair in the ear canals, and creased earlobes are associated with a higher risk for heart disease in Caucasian males.

Click the icon to see an image of an ear lobe crease.

Diagnosis

Many tests can diagnose possible heart disease. The choice of which (and how many) tests to perform depends on the patient's risk factors, history of heart problems, and current symptoms. Usually the tests begin with the simplest and may progress to more complicated ones.

Doctors routinely check for high blood pressure and unhealthy cholesterol levels in all older adults. Specific tests are also important in people who may have risk factors or symptoms of diabetes. Doctors may also test for homocysteine, the protein albumin, and blood clotting factors, especially fibrinogen.

An electrocardiogram (ECG) measures and records the electrical activity of the heart. Between 25 - 50% of people who suffer from angina or have silent ischemia, however, have normal ECG readings. The waves measured by the ECG correspond to the contraction and relaxation pattern of the different parts of the heart. Specific waves seen on an ECG are named with letters:

The electrocardiogram (ECG, EKG) is used extensively in the diagnosis of heart disease, from congenital heart disease in infants to myocardial infarction and myocarditis in adults. Several different types of electrocardiogram exist.

P. The P wave is associated with the contractions of the atria (the two chambers in the heart that receive blood from outside).
QRS. The QRS is a series of waves associated with ventricular contractions. (The ventricles are the two major pumping chambers in the heart.)
T and U. These waves follow the ventricular contractions.

The most important wave patterns in diagnosing and determining treatment for heart disease and heart attack are called ST elevations and Q waves.

A depressed or horizontal ST wave suggests some blockage and the presence of a heart disease, even if there is no angina present. (This finding, however, is not very accurate, particularly in women, and can occur without heart problems).
ST elevations and Q waves are the most important wave patterns in diagnosing and determining treatment for a heart attack. They suggest that an artery to the heart is blocked, and that the full thickness of the heart muscle is damaged. ST segment elevations do not always mean the patient has a heart attack. And, some heart attack patients do not have elevated ST segments. Other factors are important in making a diagnosis.

The primary value of exercise stress tests is not to detect coronary artery disease but to help determine the severity and predict the outcome of an existing heart condition. It is considered for the following people:

Patients with possible or probable angina and low or intermediate risk for adverse heart events.
Selected adults who do not have symptoms of heart disease but are at moderate risk to high risk for developing heart disease (a 10 - 20% chance within 10 years). Moreover, heart blockage without angina (silent ischemia) may suggest a more severe condition, at least in men.

Basic Procedure. A stress test (exercise tolerance test) monitors the patient's heart rhythms, blood pressure, and clinical status. It can tell how well the heart handles work and if parts of the heart have decreased blood supply. A typical stress test involves:

The patient walks on a treadmill or rides a stationary bicycle. Exercise continues until the heart is beating at least 85% of its maximum rate, until symptoms of heart trouble occur (changes in blood pressure, heart rhythm abnormalities, angina, fatigue), or the patient simply wants to stop.
For patients who cannot exercise, the doctor may administer dobutamine or arbutamine, which are drugs that simulate the stress of exercise.
An ECG is used to monitor heart rhythms during a stress test. (An echocardiogram or more advanced imaging technique may also be used to visualize the actions of the heart and blood flow.)

More than 25% of patients stop exercising before they reach their own maximum limits because of fear of a heart event. Patients should be reassured that the activities performed in the test under the guidance of a professional are safe.

Interpreting Results. To accurately assess heart problems, experts look at a number of findings derived from the ECG and other tools during exercise. They include:

Exercise capacity. This is a measure of a person's capacity to reach certain metabolic rates.
Heart rate and ST waves. On ECGs, doctors specifically look for abnormalities in part of the wave tracing called an ST segment. A certain type of ST segment depression may suggest the presence of heart disease. However, gender, drugs and other medical conditions can affect the ST segment. Using a measurement that adjusts the ST segment to heart rate improves accuracy.
Dukes Treadmill Score. This important score uses the number of minutes a patient can exercise and other factors that are present in patients with exercise-limiting angina.
Heart rate recovery.
Chronotropic index. This is the percentage of the heart-rate reserve that is used during the exercise. A result of 80% or less suggests a significant risk for serious heart problems in most patients.
Changes in systolic blood pressure.

Using these and other measures, doctors can determine risk fairly accurately, particularly for men of any age with chronic stable angina. The test has limitations, however, and some are significant. For example, a 2002 study indicated that in patients with suspected unstable angina the chances for a future adverse heart event remain high even if the exercise test shows low risk. In addition, for many reasons, the test is less accurate in women, and an echocardiogram may be a more accurate procedure for them. About 10% of patients, particularly younger people, will have false positive test results. In such cases, test results indicate abnormalities when there are no heart problems.

An echocardiogram is a noninvasive test that uses ultrasound images of the heart. This test is more expensive than an ECG, but it can be very valuable, particularly when used with a stress test, to detect the location and extent of heart muscle damage. It appears to be more accurate for women than ECG stress tests, but at this time it is not routinely recommended as a replacement for most women.

Computed tomography (CT) scans used alone or with ECG may be used to detect calcium deposits on the arterial walls, which are strong indicators of current and future coronary artery disease. The presence of calcium does not always signify narrowing of the arteries. But, the absence of calcification in the arteries indicates the patient has no risk for heart disease.

Advanced CT techniques are improving accuracy:

Click the icon to see an image of a CT scan.

Electron Beam Computed Tomography. Electron beam computed tomography (EBCT) is a CT technique that scans the heart so quickly that the motion of the heart appears frozen. This procedure identifies calcification and stratifies cardiac risk accurately.
Multidetector Computed Tomography. Another CT technique called multidetector computed tomography (MDCT) is able to take pictures of the entire heart in 1 millimeter slices in the time it takes for a patient to hold one breath. A 2006 study indicated that MDCT tends to have a high “false-positive” rate (indicating disease when it is not actually there), but for some patients the test may be helpful in ruling out coronary artery disease.

Some expert groups recommend CT scans in selected patients who have an intermediate risk (10 - 20% chance of heart disease within 10 years). For some of these patients, EBCT may be preferred over exercise stress testing, but most experts recommend a stress test as the main diagnostic tool. In general, the use of these expensive imaging tests is probably not very helpful for people at low or high risk. (For people with high risk, the additional information from these tests would not add much value.) More research is needed to determine the benefits of CT scanning in specific individuals.

Radionuclide procedures use imaging techniques and computer analyses to plot and detect the passage of radioactive tracers through the region of the heart. Such tracing elements are typically given intravenously. Radionuclide imaging is useful for diagnosing and determining:

Severity of unstable angina when less expensive diagnostic approaches are unavailable or unreliable
Severity of chronic coronary artery disease
Success of surgeries for coronary artery disease.
Whether a heart attack has occurred

Various imaging techniques may be used with radionuclide procedures, including:

Planar scintigraphy uses a special overhead camera and is the oldest scanning technique.
Single-photon emission computed tomography (SPECT) uses a camera that rotates around the patient and takes pictures of "slices" of the heart. It is more accurate than planar imaging in precisely locating problems in the arteries.
Positron-emission tomographic (PET) scanners employ multiple rings that surround the patients, which detect and record atomic particles (photons) that are emitted by the tracer elements (such as radioactive oxygen, nitrogen, or carbon). It is more expensive and less widely available than SPECT.

Myocardial Perfusion (Blood Flow) Imaging Test (also called the Thallium Stress Test). This radionuclide test is typically used with an exercise stress test to determine blood flow to the heart muscles. It is a reliable measure of severe heart events. It may be useful in determining the need for angiography if CT scans have detected calcification in the arteries. About a minute before the patient is ready to stop exercising, the doctor administers a radioactive tracer into the intravenous line. (Tracers include thallium, technetium, or sestamibi.) Immediately afterwards, the patient lies down for a heart scan, usually with a planar scintigraphy or with SPECT. If the scan detects damage, more images are taken 3 or 4 hours later. Damage due to a prior heart attack will persist when the heart scan is repeated. Injury caused by angina, however, will have resolved by that time.

Radionuclide Angiography. This is a technique for visualizing the chambers and major blood vessels of the heart. It uses an injected radioactive tracer and can be performed during exercise, at rest, or with use of stress-inducing drugs. It is an excellent test for assessing the heart's pumping action and for determining the severity of coronary artery disease. It is an alternative to echocardiograms in certain situations.

Click the icon to see an internal view of the heart.

Magnetic Resonance Angiography (MRA). MRA is a very promising noninvasive imaging technique that can provide three-dimensional images of the major arteries to the heart and identify disease with high accuracy. Experts believe this approach will eventually be a good alternative to angiography.

Click the icon to see an image of a MRI.

Angiography is an invasive test. It is used for patients who show strong evidence for severe obstruction on stress and other tests, and for patients with acute coronary syndrome.

A narrow tube is inserted into an artery, usually in the leg or arm, and then threaded up through the body to the coronary arteries.
A dye is injected into the tube, and an x-ray records the flow of dye through the arteries.
This process provides a map of the coronary circulation, revealing any blocked areas.

Click the icon to see an image of dye in the coronary artery.

Major complications include stroke, heart attacks, and kidney damage. These risks are very low (about 0.1%), however, if the procedure is done in an experienced medical center (one that performs at least 300 of these operations every year). Allergic reactions can also occur. The procedure is expensive, and between 10 - 30% of patients who have this procedure have normal results.

When heart cells become damaged, they release different enzymes and other molecules into the bloodstream. Elevated levels of such markers of heart damage in the blood or urine may help predict a heart attack in patients with severe chest pain and help determine treatment. Some of these factors include:

Troponins. The proteins cardiac troponin T and I are released when the heart muscle is damaged. Both are proving to be among the best diagnostic indications of heart attacks. They help to identify many individuals with ACS who might otherwise be misdiagnosed.
Creatine kinase myocardial band (CK-MB). CK-MB has been a standard marker, but the MB fraction is not as accurate as troponin levels, since elevated levels can appear in people without heart injury.
Myoglobin. Myoglobin is a protein found in heart muscles. It is released early in the injured heart, and it may be useful in combination with CK-MB and the troponins.
Newer biomarkers, including C-reactive protein (CRP), homocysteine, B-type natriuretic peptide (BNP), urinary albumin, and fibrinogen.

Several 2006 studies that evaluated how well biomarkers predict risk of heart events concluded that they do not provide much more useful information than standard risk factors (high blood pressure, unhealthy cholesterol levels, diabetes). At this time, most experts feel that these standard disease risk factors provide the best predictors of the likelihood of developing coronary artery disease, heart attack, or stroke.

Managing Heart Disease

The approach for managing any degree of coronary artery disease involves lifestyle changes. Depending on severity and individual conditions, patients may need one or more medications, surgery, or both.

Healthy diet, regular exercise and quitting smoking if you are a smoker may prevent heart disease. Follow your health care provider's recommendations for treatment and prevention of heart disease.

Experts have come up with a mnemonic device (ABCDE) for remembering 10 factors that are fundamental for management of stable angina and coronary artery disease:

A. Aspirin and anti-angina drugs

B. Blood pressure and beta-blockers

C. Cholesterol-lowering drugs (typically statins) and cigarettes (stopping)

D. Diet and diabetes control

E. Exercise and education

Unstable angina is now usually classified with non-Q myocardial infarction as acute coronary syndrome (ACS) in professional discussions of treatments. ACS usually requires more aggressive treatments, including surgery. [ACS is more fully discussed in In-Depth Report #12: Heart attack and acute coronary syndrome.]

Click the icon to see an image about angina.

Anti-Clotting Medications

Anti-clotting drugs that inhibit or break up blood clots are used at every stage of heart disease. They are generally classified as either antiplatelets or anticoagulants. All anti-clotting therapies carry the risk of bleeding, which can lead to dangerous situations, including stroke.

A thrombus is a blood clot that forms in a vessel and remains there. An embolism is a clot that travels from the site where it formed to another location in the body. Thrombi or emboli can lodge in a blood vessel and block the flow of blood in that location depriving tissues of normal blood flow and oxygen. This can result in damage, destruction (infarction), or even death of the tissues (necrosis) in that area.

Antiplatelet Drugs. These drugs prevent formation of blood platelets. Platelets are very small disc-shaped blood cells that are important for blood clotting.

Aspirin. Aspirin is an antiplatelet. It is the most common anti-clotting drug. Nearly anyone with existing heart disease or at risk for it is advised to take a low-dose aspirin every day.
Thienopyridines. Clopidogrel (Plavix) and ticlopidine (Ticlid) are thienopyridines, another type of anti-platelet drug.
Glycoprotein IIb/IIIa Inhibitors. These powerful blood-thinning drugs include abciximab (ReoPro, Centocor), eptifibatide (Integrilin), tirofiban (Aggrastat), and lamifiban. They are administered intravenously in the hospital and are used after angioplasty surgery and stent placement.

Click the icon to see an image about blood.

Anticoagulants. Anticoagulants help thin blood and include:

Heparin
Warfarin (Coumadin)
Direct thrombin inhibitors

Aspirin. Aspirin is known as a nonsteroidal anti-inflammatory drug (NSAID). It stops blood platelets, which are major clotting factors, from sticking together to form a blood clot. A daily low-dose aspirin (75 - 325 mg) is usually the first choice for preventing heart disease in high-risk individuals. Aspirin can prevent by 25 – 50% the risk of heart attacks and death in people with existing heart disease and a history of heart attack. It also reduces the risk for stroke. According to a 2006 review, aspirin works equally well for both men and women.

Click the icon to see an image about stomach ulcers.

Side effects from prolonged use of aspirin may include stomach ulcers and bleeding. (There may be a slight increased risk for bleeding-related strokes, which are very uncommon, however. Furthermore, this risk may be outweighed by protection against the more common type of stroke, which is caused by artery blockage.)

Clopidogreland Ticlopidine. Clopidogrel (Plavix) and ticlopidine (Ticlide) are anti-platelet drugs known as thienopyridines. When taken with aspirin, these drugs can significantly reduce the risk for heart attack and stroke in patients with acute coronary syndrome (unstable angina or early signs of heart attack). The combination of aspirin and a thienopyridine is essential for patients who have a drug-eluting stent. According to a 2007 American Heart Association advisory, patients who have a drug-eluting stent must take both aspirin and a thienopyridine for at least 1 year after the stent is inserted. Many experts recommend clopidogrel instead of ticlopidine because ticlopidine has been associated with dangerous blood disorders, particularly thrombocytopenia.

Clopidogrel is also recommended for patients who are undergoing angioplasty. For patients having coronary bypass surgery, it should be withheld for at least 5 -7 days prior to surgery because of a significant bleeding risk. Researchers are investigating whether clopidogrel and aspirin together are better than aspirin alone in reducing the risks following coronary bypass surgery. A 2006 study suggested that for some patients with heart disease, clopidogrel plus aspirin does not work better than aspirin alone for preventing a first heart attack or stroke.

Click the icon to see an image of the developmental process of atherosclerosis.

Click the icon to see an image about atherosclerosis.

Anticoagulants are drugs that prevent or delay blood coagulation and the formation of blood clots. Heparin has been the standard anticoagulant, but a number of drugs are now available that are proving to be better choices in many cases.

Standard (Unfractionated) Heparin. The heparin referred to as unfractionated heparin has been the standard for years and is used alone or in combination with aspirin for managing unstable angina. It is no longer the recommended first choice, however, for this patient group. It must be intravenously administered and monitored with frequent blood tests. The major complication is thrombocytopenia (a severe drop in platelets). This condition is extremely serious and can become life-threatening, particularly with bleeding in various body tissues. Alternatives include low-molecular weight heparin and direct thrombin inhibitors.

Low-Molecular Weight Heparin. Enoxaparin (Lovenox), dalteparin (Fragmin), tinzaparin (Innohep) are drugs known as low-molecular weight heparins (LMWHs). Many doctors now recommend these drugs over standard heparin for patients with unstable angina (unless bypass surgery is being planned). They have similar rates of survival, recurring angina, and bleeding as standard heparin. However, they pose lower risks for heart attack, repeat angioplasties, and thrombocytopenia. They require injections but do not require the ongoing monitoring that standard heparin does. Patients may even be able to self-administer LMWHs as people with diabetes do insulin.

Warfarin. Warfarin (Coumadin) is an oral anticoagulant. It prevents clots by inhibiting vitamin K. Warfarin is used with aspirin after a heart attack to prevent another one and to prevent blood clots in patients with atrial fibrillation. Warfarin is also proving to be more effective than aspirin for preventing heart attacks in patients with acute coronary syndromes. Warfarin therapy poses a dangerous risk for bleeding and blood coagulation must be monitored with frequent blood tests.

Direct Thrombin Inhibitors (DTIs). Direct thrombin inhibitors are a more recent group of anti-coagulants. The first DTI was hirudin, a natural substance derived from the saliva of leeches. New forms include argatroban (Novastan), bivalirudin (Angiomax), danaparoid (Orgaran), lepirudin (Refludan), desirudin (Revasc), and ximelagatran (Exanta). Many of these drugs are used along with warfarin and may be good options for patients who develop thrombocytopenia with heparin use. DTIs may prove to be superior to standard heparin for patients with acute coronary syndrome.

Other Medications

Nitrates have been used in the treatment of angina for over 100 years. These drugs release nitric oxide, thereby relaxing the smooth muscles in blood vessels. Many nitrate preparations are available. The most commonly used are nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates can be absorbed from the gastrointestinal tract (oral tablet), skin (ointment or patch), or from under the tongue (sublingual tablet or spray).

Rapid Acting Nitrates. Rapid-acting nitrates are used to treat acute attacks. Nitroglycerin is the most widely used drug for this purpose. It can be administered under the tongue (sublingually or as a spray) or pocketed between the upper lip and gum (buccally) and can relieve angina within minutes. The procedure for taking nitroglycerin during an attack is as follows:

At the onset of an angina attack, the patient administers one sublingual or buccal tablet or one metered dose of the spray.
If the pain is not relieved within 5 minutes the patient takes a second dose; a third can be taken after another 5 minutes if symptoms persist.
If pain continues after a total of three doses in 15 minutes, the patient should go immediately to the nearest emergency room.

Nitroglycerin is very volatile so its potency can be easily lost. Patients should take the following precautions:

Keep no more than 100 tablets on hand, stored in their original container.
When first opened, the cotton filler should be discarded, and the cap screwed on tightly immediately after each use.
A supply should always be kept close at hand in case of an attack, with the rest kept in a cool dry place.

Intermediate to Long-Term Nitrates. Sublingual tablets of isosorbide dinitrate have a somewhat slower onset of action than nitroglycerin and are useful for preventing exercise angina. Ointments, patches, and oral tablets are used for longer-term prevention of angina attacks:

Transdermal patches are applied in the morning to any hair- or injury-free area on the chest, back, stomach, thigh, or upper arm. Hands should be washed after each patch or ointment application, and sites of application should be rotated to avoid skin irritation.
Nitroglycerin ointment is applied by measuring out an even amount on an applicator paper and then placing, not rubbing or massaging, it on the chest, stomach, or thigh. Any ointment that remains from the previous application should be removed.

Long-acting forms may lose their effectiveness over time, so doctors generally schedule nitrate-free breaks to prevent tolerance. Some concern exists that nitrate-free periods might increase the risk for angina and adverse heart events. One large study, however, found no increased danger when patients used a nitroglycerine patch with scheduled breaks. The use of high blood pressure drugs known as ACE inhibitors may help prevent tolerance to nitrates.

Side Effects. Nitrates have many side effects, some of which can be serious.

Common side effects of nitrates include headaches, dizziness, nausea and vomiting, blurred vision, fast heartbeat, sweating, and flushing on the face and neck. Low blood pressure and dizziness can be relieved by lying down with the legs elevated. These effects are significantly worsened by alcohol, beta-blockers, calcium channel blockers, sildenafil (Viagra), and certain antidepressants. The doctor may prescribe medicines to lessen these side effects. Patients should contact their doctor if these side effects are persistent or severe.

Serious side effects requiring immediate medical help include fever, joint or chest pain, sore throat, skin rash (especially on the face), unusual bleeding or bruising, weight gain, and swelling of the ankles.

Withdrawal. Withdrawal from nitrates should be gradual. Abrupt termination may cause angina attacks.

Beta-blockers are useful for preventing angina attacks and reducing high blood pressure. They reduce the heart's oxygen demand by slowing the heart rate and lowering blood pressure. They are recognized for reducing deaths from heart disease and from heart surgeries, including angiography and coronary bypass. Beta-blockers are the drugs of choice for older patients with stable angina and may also be beneficial for people with silent ischemia. They are, however, less useful for the treatment of Prinzmetal’s angina. Beta-blockers are often prescribed along with other drugs such as nitrates, calcium channel blockers, or statins. A 2006 study suggested that beta-blockers and statins may help stabilize coronary artery disease and prevent the development of heart attacks.

Specific Beta-blockers. Beta-blockers include propranolol (Inderal), carvedilol (Coreg), bisoprolol (Zebeta), acebutolol (Sectral), atenolol (Tenormin), labetalol (Normodyne, Trandate), metoprolol (Lopressor, Toprol-XL), and esmolol (Brevibloc). A nasal spray form of propranolol appears to be very helpful in reducing exercise-induced angina attacks.

Side Effects. Beta-blocker side effects include fatigue, lethargy, vivid dreams and nightmares, depression, memory loss, and dizziness. They can lower HDL (“good”) cholesterol. Beta blockers are categorized as non-selective or selective. Non-selective beta blockers such as carvedilol and propranolol can narrow bronchial airways. These beta-blockers should not be used by patients with asthma, emphysema, or chronic bronchitis.

Patients should never abruptly stop taking these drugs. The sudden withdrawal of beta-blockers can rapidly increase heart rate and blood pressure. The doctor may advise a patient to slowly decrease the dose before stopping completely.

Calcium channel blockers reduce heart rate and slightly dilate the blood vessels of the heart, thereby decreasing oxygen demand and increasing oxygen supply. They also reduce blood pressure. CCBs vary chemically, however, and although some are helpful, others may even be dangerous for certain patients with angina.

Click the icon to see an image of the anterior heart arteries.

Long-acting nifedipine (Adalat, Procardia) and nisoldipine (Sular) and newer CCBs, such as amlodipine (Norvasc) and nicardipine (Cardene), may be beneficial for some patients with angina. They can be considered alone for patients who cannot tolerate beta-blockers, but may provide the best results when used in combination with a beta-blocker. Studies suggest that they reduce the need for repeat angioplasties. Their effects on other outcomes, including mortality rates and heart attack, are less clear.
Short-acting CCBs, including short-acting forms of verapamil, diltiazem, nifedipine, and nicardipine, are helpful for many patients with Prinzmetal's angina. However, short-acting forms of certain CCBs, such as nifedipine and nisoldipine, have been associated with severe and even dangerous side effects, including an increase in heart attacks and sudden death in some patients with unstable angina. They also increase the risk for adverse effects in patients with stable angina. Short-acting CCBs are, therefore, not used for stable or unstable angina.

There is no strong evidence that any calcium channel blockers improve survival rates. Overdose can cause dangerously low blood pressure and slow heart beats. Patients with heart failure have a higher risk for death with these drugs and should not take them. No one taking any calcium channel blocker should withdraw abruptly because such action could dangerously increase the risk of high blood pressure. Note: Grapefruit and Seville oranges boost the effects of CCBs, sometimes to toxic levels. (Regular oranges do not appear to pose any hazard.)

Angiotensin converting enzyme (ACE) inhibitors are important heart-protective drugs, particularly for people with diabetes and high blood pressure. They reduce the production of angiotensin, a chemical that causes arteries to narrow, and so are commonly used to lower blood pressure. They may also reduce risk for heart attack, stroke, complications of diabetes, and death in patients at high risk for heart disease.

ACE inhibitors include captopril (Capoten), ramipril (Altace), enalapril (Vasotec), quinapril (Accupril), benazepril (Lotensin), perindopril (Aceon), and lisinopril (Prinivil, Zestril).

Side Effects. Side effects of ACE inhibitors are uncommon but may include an irritating cough, excessive drops in blood pressure, and allergic reactions. In the past, doctors sometimes avoided giving aspirin to patients who were taking ACE inhibitors because the combination was believed to cause kidney problems. But, a 2005 study of patients with both coronary artery disease and heart failure found that taking aspirin and ACE inhibitord together is safe. The researchers also noted that taking aspirin with an ACE inhibitor can significantly reduce the risk of death for older patients with CAD and heart failure. [See In-Depth Report #14: High blood pressure.]

In 2004, the National Cholesterol Education Program issued updated recommendations on how to control cholesterol levels. These guidelines emphasize that patients should lower their LDL (“bad”) cholesterol and recommend that more people take LDL-lowering medication. Lowering LDL cholesterol and raising HDL (“good”) cholesterol can significantly reduce the risks of heart disease. Several different types of drugs (statins, bile-acid binding resins, niacin, and fibrates) are used to treat cholesterol. [See In-Depth Report #23: Cholesterol.]

Statins are the most important of these drugs. Brands include lovastatin (Mevacor), pravastatin (Pravachol), simvastatin (Zocor), fluvastatin (Lescol), atorvastatin (Lipitor), and rosuvastatin (Crestor). A major analysis of over 200 studies found that statins reduced the risk for heart problems by 60% and stroke by 17%. A 2005 review found that the more that statins lower LDL, the more they reduce CAD and other heart disease risks.

An important 2006 study found that aggressive treatment with statins may have the potential to reverse coronary artery disease. In the study, rosuvastatin reduced fatty plaque in the arteries in addition to improving LDL and HDL cholesterol levels. However, a follow-up 2007 study of rosuvastatin indicated that while the drug slowed the rate of atherosclerotic progression, it did not reverse heart disease. Future studies will continue to investigate this issue.

Side effects of statins may include stomach upset, headaches, skin rashes, muscle aches, sexual dysfunction, drowsiness, dizziness, nausea, constipation, and peripheral neuropathy (numbness or tingling in the hands and feet).

The main safety concern with statins is an uncommon condition called myopathy, which can cause muscle and joint pain and possible muscle damage. Doctors will immediately stop statin therapy if myopathy occurs. Patients should talk to their doctor about any unusual muscle discomfort or weakness, or if their urine becomes brown-colored. Statins can also affect the liver, particularly at higher doses, so patients taking these drugs should receive regular liver function tests.

Click the icon to see an image of cholesterol.

Influenza Vaccinations (Flu Shots). Evidence suggests influenza vaccinations help protect against adverse heart events (including after heart surgeries), stroke, and death from all causes in the elderly. Still, studies suggest that only two-thirds of at risk people are vaccinated, mostly because of unwarranted fears of ineffectiveness or adverse effects.

Antibiotics. Researchers have investigated antibiotics for treating patients with heart disease and past infection of the bacteria Chlamydia pneumoniae. Results from several recent large-scale clinical trials suggest that antibiotic treatment provides no benefit in preventing heart attack or other cardiac events in patients with coronary artery disease. In addition, a 2006 study indicated that short-term treatment with the antibiotic clarithromycin may increase the risk for death in patients with coronary artery disease. While it is still possible that C. pneumoniae may play a role in triggering inflammatory responses associated with ACS, antibiotic therapy is no longer considered appropriate for treatment or prevention of heart disease.

Ranolazine (Ranexa) was approved in 2006 for treatment of chronic angina. It is recommended for patients who have not responded to other angina drugs. Ranolazine is taken in combination with amlodipine, beta blockers, or nitrates. The drug appears to work better in men than in women

Gene Therapy and Angiogenesis. Proteins known as growth factors are being investigated for their ability to grow new blood vessels for supplying oxygen to the heart. After promising small trials, two large studies of genetically engineered forms of vascular endothelial growth factor (VEGF) and fibroblast growth factor (FGF [GenerX]) failed to detect any benefits. Studies on therapies that actually genetically encode these proteins are underway.

Testosterone Supplements. Some trials using testosterone supplements or patches have reported improved exercise-induced blood flow in the coronary arteries and improvement in angina in some cases. Supplements of this male hormone, however, may increase the risk for prostate cancer. Experts suggest that testosterone be used only in older men with significant deficiencies in testosterone.

Selective Estrogen-Receptor Modulators (SERMs). Selective estrogen-receptor modulators (SERMs), including raloxifene (Evista), have been designed to produce the benefits of estrogen without its risks. They are thought to act like estrogen in some tissues but behave like estrogen blockers (antiestrogens) in others. Raloxifene may have some heart benefits, although it poses a risk for deep vein blood clots, which may have long-term implications for patients with heart problems. A major study is underway to determine its effects on the heart.

Surgery

Surgery is usually recommended for patients who have:

Unstable angina that does not respond promptly to medical treatment
Severe recurrent episodes of angina that last more than 20 minutes
Acute coronary syndrome
Severe coronary artery disease (severe angina, multi-artery involvement, evidence of ischemia), particularly if abnormalities are evident in the left ventricle of the heart, the main pumping chamber

Atherosclerosis is a disease of the arteries in which fatty material is deposited in the vessel wall, resulting in narrowing and eventual impairment of blood flow. Severely restricted blood flow in the arteries to the heart muscle leads to symptoms such as chest pain. Atherosclerosis shows no symptoms until a complication occurs.

Researchers have been investigating whether surgery offers any advantages if used as an early treatment for mild angina. A major analysis in 2003 reported that the use of angioplasty in patients with mild heart blockage did not reduce the risk for heart attack or death over the long term. A landmark 2007 study found that angioplasty was no better than drug therapy for preventing heart attack and stroke in patients with stable coronary artery disease. (For more information, see Angioplasty and Stents.)

Two effective surgical procedures for heart patients are:

Coronary artery bypass grafting (commonly called bypass or CABG)
Percutaneous coronary intervention (commonly called angioplasty or PCI), usually with coronary artery stent placement

Click the icon to see an image about bypass grafting.

Each of these procedures is described below.

Studies have generally reported similar survival rates with either procedure. There are some differences, however, and decision often depends on individual conditions. Patients considering surgery should discuss all options and risks with their doctor. No surgical procedure cures coronary artery disease, and patients must continue to rigorously maintain a healthy lifestyle and any necessary medications. For some patients, lifestyle changes and medications may be able to control the disease without surgery or angioplasty.

Considerations for Choosing Angioplasty with Stent Placement. Angioplasty has the following advantages for most patients. It is:

Less invasive than bypass. (Although a minimally invasive variation of bypass surgery may reduce this distinction.)
Less expensive than bypass. (Although the postoperative need for more medications and the high risk for repeat procedures to reopen the artery may reduce the long-term difference in cost between the two procedures.)
Life-saving emergency procedure for many patients with heart attacks. (The use of bypass after a heart attack has much higher mortality rates than when it is used electively and its use is controversial in heart attack patients.)

It has the following disadvantages:

The blood vessels can close up again (restenosis) so that patients require additional procedures. (New blood thinning drugs, coronary stent coatings, and radiation treatments may help to significantly reduce restenosis rates. However, there is also some indication that stents, especially drug-eluting stents, may increase the risk for blood clots.)
It is not as appropriate as bypass for many patients with angina (people with diabetes, elderly patients, or those with multi-vessel blockage). Increasingly, however, angioplasty is proving to be as safe and as effective as bypass in many high-risk patients. Patients should be sure to discuss with their doctors the relevant risks and benefits of angioplasty and bypass.

Considerations for Choosing Bypass. Bypass is usually the appropriate procedure in patients with high-risk conditions, such as:

Multi-vessel blockage. (In one report comparing surgery to angioplasty in patients with two or three blocked vessels, the mortality rate 1 year after bypass was 0.8% and after angioplasty was 2.5%. About 80% of patients in the study were men.)
Diabetes. (Bypass produces significantly higher survival rates in these patients. Some experts believe angioplasty should rarely, if ever, be used in this population.)
Being elderly.
Certain structural features, such as a left main artery narrowed by 50% or more or a very long diseased portion of the artery.

Considerations for Women. Studies have reported higher mortality rates in women than in men after any heart surgery. Some experts theorize that on average women may be older and sicker when they have a heart operation. A 2002 study, however, suggested that when women with acute coronary syndromes are given the same aggressive and early treatment as men are, their survival rates are equal or even better.

In addition to angioplasty and bypass procedures, a number of other procedures are available or under investigation for coronary artery disease. They include:

Atherectomy
Myocardial Laser Revascularization
Enhanced External Counterpulsation (EECP)

Coronary Artery Bypass Graft Surgery

Coronary artery bypass graft surgery (CABG) is a good alternative to angioplasty for many patients, but it is very invasive. The surgery involves the following processes:

Click the icon to see an animation about CABG.

The chest is opened, and the blood is rerouted through a lung-heart machine.
The heart is stopped during the procedure.
Large blood vessels supply the grafts, which are used to reroute the blood. The blood vessel grafts are transplanted in front of and beyond the blocked arteries, so the blood flows through the new vessels around the blockage.
The standard grafts now use arteries taken from the chest wall. Studies are reporting that with such grafts arteries remain open in 90% of cases after 15 years.
In general, patients with triple bypass procedures stay in the hospital for 5 days. Those with one-vessel bypass may be able to go home in 3 days.

Click the icon to see an illustrated series detailing a heart bypass surgery.

In spite of the invasive nature of this procedure, elective bypass procedures produce better long-term survival rates than angioplasty, particularly in patients with diabetes and multi-vessel blockage. Overall mortality rates after this procedure range from 1% to slightly over 2%. The risk for stroke or heart attack after a bypass operation ranges from 1.3 - 5%. Finding a surgeon who performs at least 100 of the procedures a year helps reduce the risk for complications.

Blood clots may form in the new graft, closing it up or narrowing the treated vessel over time. Therapy with aspirin and other anti-clotting drugs help keep the graft open and working properly. For long-term prevention of closure, as well as for slowing progression of atherosclerosis, aggressive treatment with cholesterol-lowering drugs may be more beneficial than standard anti-clotting drugs.

Bleeding is also a potential complication of CABG. Anti-bleeding (also called hemorrhage-sparing) drugs are sometimes used to limit blood loss in patients who undergo this surgery. In 2006, concerns were raised about one of these drugs, aprotinin (Trasylol). Data suggested that aprotinin seriously increased the risks for kidney failure, heart failure, and stroke.

An important study, published in 2007 in the Journal of the American Medical Association, compared aprotinin with two anti-fibrinolytic drugs, aminocaproic acid (Amicar) and tranexamic acid (Cyklokapron), which are also used to control blood loss. The study of nearly 4,000 patients who had CABG found that over a 5-year period, the death rate for patients who took aprotinin was 21%, and patients had a 48% increased risk of dying. By comparison, the death rate was 16% for aminocaproic acid, 15% for tranexamic acid, and 13% for no anti-bleeding drug. Because aprotinin is more expensive as well as potentially more dangerous than other anti-bleeding drugs, experts are now recommending against its use in CABG.

Minimally invasive bypass (also called buttonhole or keyhole bypass) surgeries are exciting advances in basic bypass surgery. Studies indicate good success of these procedures for patients with disease in single vessels. They are also being investigated for multiple vessels.

One variation of minimally invasive bypass uses a four-inch incision. The surgeon works on the front of the heart while it is beating slowly. To date, there have been no differences in cardiac events or later mental complications between this so-called off-pump procedure and the standard bypass procedure.
In another variation, the heart is stopped, and the patient is put on a machine that reroutes the blood through a device that keeps it oxygenated. Fiberoptic scopes and instruments are passed through a number of finger-sized incisions. The surgeon works on all sides of the heart, guided by a video image from a tiny camera inserted through a 4-inch incision.
Some advanced heart centers now use robotic systems, which allow the surgeon to perform extremely delicate maneuvers on tiny vessels through pencil-size incisions. They are not yet used for the whole bypass process.

Eventually, minimally invasive bypass procedures may prove to be less expensive, require a shorter hospital stay, and have fewer complications than conventional coronary artery bypass surgery -- or even angioplasty. At this time, however, they are experimental procedures, performed in only a few medical centers for select candidates. Long term-success rates are unknown.

Angioplasty and Stents

Percutaneous coronary intervention (PCI), also called angioplasty, involves procedures such as percutaneous transluminal coronary angioplasty (PTCA) that help open the blocked artery.

Click the icon to see an animation about percutaneous transluminal coronary angioplasty.

A typical angioplasty procedure follows these steps:

The cardiologist threads a narrow catheter (a tube) containing a catheter into the blocked vessel.
The doctor opens the blocked vessel using balloon angioplasty, in which the surgeon passes a tiny deflated balloon through the catheter to the vessel.
The balloon is inflated to compress the plaque against the walls of the artery, flattening it out so that blood can once again flow through the blood vessel freely.
In order to keep the artery open afterwards, surgeons use a device called a coronary stent, an expandable metal mesh tube that is implanted during angioplasty at the site of the blockage. (In some cases, a stent may be used as the initial opening device instead of balloon angioplasty.)
Once in place, the stent pushes against the wall of the artery to keep it open.

Click the icon to see an animation about percutaneous transluminal coronary angioplasty.

Complications occur in about 10% of patients (about 80% within the first day). Outcomes are better in hospital settings with experienced teams and backup.

Click the icon to see an illustrated series detailing coronary artery balloon angioplasty surgery.

The most important long-term complication is reclosure (restenosis), which can lead to heart attack if not treated with a repeat procedure. Stenting and other advances have helped significantly in preventing reclosure and reducing heart attack rates. Nevertheless, a repeat procedure is still needed to restore the opening in 10 - 15% of procedures that use stents.

PCI (angioplasty) has been proven to help reduce the frequency of angina attacks. It is commonly recommended for patients who have critically blocked arteries or have already had a recent, acute heart attack. PCI can also help improve survival and prevent heart attacks in patients with acute coronary syndrome (ACS). However, doctors have been uncertain about angioplasty’s benefits for survival and heart attack prevention in lower-risk patients with stable coronary artery disease.

In 2007, a landmark study was published in the New England Journal of Medicine and presented at the 2007 meeting of the American College of Cardiology. The COURAGE study found that PCI works no better than standard heart medication (drugs to control blood pressure, lower cholesterol, and prevent blood clots) in preventing heart attack, stroke, and hospitalization in patients with stable coronary artery disease. Based on this study’s findings, experts are now recommending angioplasty only for patients who have severe heart disease. For patients with stable heart disease, drug therapy may be sufficient enough treatment and allow them to safely defer having surgery.

Angioplasty is less invasive than bypass surgery, requiring only one night in the hospital. Recuperation takes about a week. Chest pain after the procedure is very common and usually due to problems other than ischemia. Mild chest pain is even more common when a stent is used, possibly because the artery is stretched.

Reclosure of the artery during or shortly after angioplasty often occurs. A number of anti-clotting drugs are used to help prevent this.

Aspirin and the anti-platelet drug clopidogrel (Plavix) are often used to prevent reclosure during the procedure.
A high dose of the anticoagulant heparin is typically given before the operation.
Intravenous glycoprotein IIb/IIIa inhibitors, powerful drugs that block platelets, also prevent reclosure after stenting in many high-risk patients, and evidence now strongly suggests that they reduce rates of heart attack and death. Eptifibatide (Integrilin) and tirofiban (Aggrastat) are the standard drugs used during angioplasty. They may be most effective if administered during angioplasty, rather than beforehand.

All of these drugs pose a risk for bleeding complications.

Narrowing or reclosing of the artery (restenosis) can occur within a year of angioplasty or even longer in 15 - 60% of angioplasty patients. Coronary stents, anti-clotting drugs, and other advances have reduced these events significantly, but have not eliminated the problem. Theories for the cause of restenosis include:

The release of oxidants (damaging unstable particles) at the surgical site may cause injury and activate immune factors that produce cellular overgrowth in smooth muscles of the blood vessels.
Other activities, including scarring, may remodel and narrow the blood vessels. (This is most likely the reason for restenosis in patients with stents.)

Symptoms of restenosis include chest pain on exertion. (Heart attacks, however, do not usually occur with such events.) The narrowing of the artery in this case is not due to blood clots, so anti-clotting drugs are not useful. Restenosis usually requires a repeat operation. A number of approaches, mostly investigative, have been developed to prevent restenosis after angioplasty.

Drug-Coated Stents. Stents coated with the drugs sirolimus (Rapamune) or paclitaxel (Taxol) have been increasingly used in the last several years. Drug-eluting stents (as they are also called) can help prevent restenosis. However, because drug-eluting stents reduce arterial tissue growth, they can increase the risks of blood clots. In late 2006, the FDA held several meetings to discuss the increased risks of blood clots associated with drug-eluting stents. The committees found that drug-eluting stents do appear to have a small increased risk of blood clots compared to bare metal stents, but not enough research has been conducted to fully determine their risks for heart attack and death.

Five studies published in the New England Journal of Medicine in March 2007 indicated that drug-eluting stents are safe and effective for patients with coronary artery disease when they are used for FDA-approved indications. Problems have arisen when these stents are used for “off-label” purposes in patients with more complicated health problems. There is still some concern as to whether all stents (both bare metal and drug eluting) are used too frequently for patients who may be better served by drugs or bypass surgery.

In February 2007, the American Heart Association and other professional organization issued an extremely important joint advisory statement. The statement advises that all patients who have drug-eluting stents must continue to take aspirin and clopidogrel (or, rarely, ticlopidine) for at least 1 year after the stent is inserted to reduce the risk of blood clots. Clopidogrel and ticlopidine are thienopyridine drugs that, like aspirin, help prevent blood platelets from clumping together. It is very important that patients who have drug-eluting stents take both aspirin and a thienopyridine drug. If for some reason patients cannot take a thienopyridine drug, they should receive a bare metal stent instead of a drug-eluting stent.

Coronary Artery Brachytherapy. Radiation treatment called coronary artery brachytherapy (Gamma One, Beta-Cath) can slow the cell growth in the arteries that causes restenosis. With this approach, any blockage in the stent is first removed, and a tube with an inflatable balloon is inserted. The surgeon then implants a temporary device that delivers radiation. Brachytherapy has shown excellent results in preventing restenosis and significantly reducing heart events and improving survival. Brachytherapy is also showing promise in preventing restenosis in stented artery grafts that were put in place after bypass surgery and later failed. However, several 2006 studies in the Journal of the American Medical Association indicated that drug-coated stents may work better than brachytherapy in preventing restenosis in failed stents. In these studies, the drug-coated stents were inserted inside the original bare metal stents.

Medications. A number of medications are being studied for prevention of restenosis, although benefits to date have been modest. Other drugs under investigation include statins, various anti-clotting drugs, and B vitamins.

Other Procedures. Other procedures under investigation to keep the arteries open use ultrasound, "soft" x-rays, and cryotherapy (very low temperatures).

Other Treatments

Transmyocardial laser revascularization (TMLR) applies laser energy directly to areas in the heart where blockage has occurred, creating 10 - 50 tiny channels. TMLR is recommended for patients with severe angina who have not responded to surgical bypass or angioplasty procedures. TMLR is not suitable for patients who have severely damaged heart muscles. A variant called percutaneous transmyocardial laser revascularization uses a small laser (a holmium YAG laser), which is smaller than the device used in TMLR and does not require open chest surgery and a general anesthetic.

Patients report improved symptoms and exercise tolerance. Both procedures carry risks for serious complications, however, including some that can be life-threatening. It is not clear if either TMLR procedure improves survival, and, in one study, the quality of life afterwards was less than with standard heart surgeries.

A noninvasive technique called enhanced external counterpulsation (EECP) has been used successfully by over a million people in China. The technique uses an air pump that inflates and deflates pressurized cuffs around the legs, causing blood to be pushed into the heart.

EECP may help patients with angina who have not had pain relief from nitrate drugs and who do not qualify as candidates for bypass or angioplasty. In different studies, it has relieved angina in over 75% of patients who used it and reduced the need for medication. The benefits persist, and there is some evidence that it produces actual cellular changes that benefit the heart. In 2002, the FDA approved EECP for the treatment of heart failure but some insurance companies still consider its use “experimental” and will not pay for it. EECP is not recommended for patients with arrhythmia, serious heart valve problems, or peripheral artery disease.

Atherectomy procedures clear the narrowed arteries by using an approach called debulking. All of these procedures use a catheter (a thin tube) that is inserted into an artery (usually in the groin) and threaded up to the blockage. Devices are inserted through the tube to remove the plaque. They include:

Rotational atherectomy, which uses a tiny cutter spinning at 2,500 rpm
Extractional atherectomy, which "shaves" the plaque
Directional atherectomy, which slices the plaques

Although they are successful in opening arteries, they offer no advantages over standard angioplasty and are used only for special cases.

Resources

www.nhlbi.nih.gov -- National Heart, Lung, and Blood Institute
www.americanheart.org -- American Heart Association
www.acc.org -- American College of Cardiology

References

Boden WE, O'Rourke RA, Teo KK, Hartigan PM, Maron DJ, Kostuk WJ, et al. Optimalmedical therapy with or without PCI for stable coronary disease. N Engl J Med. 2007 Mar 26; [Epub ahead of print]

Crouse JR 3rd, Raichlen JS, Riley WA, Evans GW, Palmer MK, O'Leary DH, et al. Effect of rosuvastatin on progression of carotid intima-media thickness in low-risk individuals with subclinical atherosclerosis: the METEOR Trial. JAMA. 2007 Mar 28;297(12):1344-53. Epub 2007 Mar 25.

Eisenstein EL, Anstrom KJ, Kong DF, Shaw LK, Tuttle RH, Mark DB, et al. Clopidogrel use and long-term clinical outcomes after drug-eluting stent implantation. JAMA. 2007 Jan 10;297(2):159-68. Epub 2006 Dec 5.

Folsom AR, Chambless LE, Ballantyne CM, Coresh J, Heiss G, Wu KK, et al. An assessment of incremental coronary risk prediction using C-reactive protein and other novel risk markers: the atherosclerosis risk in communities study. Arch Intern Med. 2006 Jul 10;166(13):1368-73.

Garcia MJ, Lessick J, Hoffmann MH; CATSCAN Study Investigators. Accuracy of 16-row multidetector computed tomography for the assessment of coronary artery stenosis. JAMA. 2006 Jul 26;296(4):403-11.

Grines CL, Bonow RO, Casey DE Jr, Gardner TJ, Lockhart PB, Moliterno DJ, et al. Prevention of premature discontinuation of dual antiplatelet therapy in patients with coronary artery stents: a science advisory from the American Heart Association, American College of Cardiology, Society for Cardiovascular Angiography and Interventions, American College of Surgeons, and American Dental Association, with representation from the American College of Physicians. Circulation. 2007 Feb 13;115(6):813-8. Epub 2007 Jan 15.

Kastrati A, Mehilli J, Pache J, Kaiser C, Valgimigli M, Kelbaek H, et al. Analysis of 14 trials comparing sirolimus-eluting stents with bare-metal stents. N Engl J Med. 2007 Mar 8;356(10):1030-9. Epub 2007 Feb 12.

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Lloyd-Jones DM, Liu K, Tian L, Greenland P. Narrative review: Assessment of C-reactive protein in risk prediction for cardiovascular disease. Ann Intern Med. 2006 Jul 4;145(1):35-42.

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Mangano DT, Tudor IC, Dietzel C; Multicenter Study of Perioperative Ischemia Research Group; Ischemia Research and Education Foundation. The risk associated with aprotinin in cardiac surgery. N Engl J Med. 2006 Jan 26;354(4):353-65.

Mauri L, Hsieh WH, Massaro JM, Ho KK, D'Agostino R, Cutlip DE. Stent thrombosis in randomized clinical trials of drug-eluting stents. N Engl J Med. 2007 Mar 8;356(10):1020-9. Epub 2007 Feb 12.

Mosca L, Banka CL, Benjamin EJ, Berra K, Bushnell C, Dolor RJ, et al. Evidence-based guidelines for cardiovascular disease prevention in women: 2007 update. Circulation. 2007 Mar 20;115(11):1481-501.

Nicholls SJ, Tuzcu EM, Sipahi I, Grasso AW, Schoenhagen P, Hu T, et al. Statins, high-density lipoprotein cholesterol, and regression of coronary atherosclerosis. JAMA. 2007 Feb 7;297(5):499-508.

Rosamond W, Flegal K, Friday G, Furie K, Go A, Greenlund K, et al. Heart disease and stroke statistics--2007 update: a report from the American Heart Association Statistics Committee and Stroke Statistics Subcommittee. Circulation. 2007 Feb 6;115(5):e69-171. Epub 2006 Dec 28.

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Review Date:
4/16/2007
Reviewed By:
Harvey Simon, MD, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital.

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