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Coronary heart disease

coronary haert disease- Prevention

by admin on November 24, 2008

Prevention
Risk refers to the odds that something will occur, but there are no guarantees.

  • Having one or more risk factors does not mean heart disease is inevitable.
  • Similarly, absence of risk factors does not guarantee you will not have heart disease.

Monitoring and modifying certain risk factors is the best way to prevent coronary heart disease.

  • If possible, adopt a healthy lifestyle early in life.
  • Because risk factors are interrelated, many are present together in the same person.
  • Thus, moderate changes in one area of your life often reduce other risk factors at the same time.

You can’t change some risk factors.

  • Age: Men older than 45 years and women older than 55 years are at increased risk for coronary heart disease.
  • Family history: If someone in your immediate family has had coronary heart disease, angina, or heart attack by age 55 years, your risk of developing heart disease is increased. If heart disease runs in the family, seek medical attention. Your health care provider may recommend screening tests and preventive measures.

You can change the following risk factors:

  • High blood fats, the bad LDL, good HDL, and triglycerides
  • Diet
  • Smoking
  • Diabetes
  • High blood pressure
  • Obesity
  • Inactivity
  • Emotional stress

High total cholesterol: Know your total cholesterol level and take measures to control it with diet and exercise if your levels are high. Your health care provider will check your levels and compare them with guidelines from the National Cholesterol Education Program (NCEP). Your total cholesterol levels are measured in your blood after a 9- to 12-hour fast. The following subtypes of cholesterol are important:

  • LDL cholesterol
    • Less than 100 - Optimal
    • 100-129 - Near optimal/above optimal
    • 130-159 - Borderline high
    • 160-189 - High
    • 190 or higher - Very high
  • Total cholesterol
    • Less than 200 - Desirable
    • 201-239 - Borderline high
    • 240 or higher - High
  • HDL cholesterol (the good cholesterol)
    • Less than 40 - Low
    • 60 or higher - High (desirable)

Diet: A balanced, low-fat diet is good not just for people with high cholesterol but for everyone.

  • The American Heart Association recommends that maximum calories from fat be less than 30% of total calories in any meal.
  • Each day, try to eat 6-8 servings of bread, cereal, or rice; 2-4 servings of fresh fruit; 3-5 servings of fresh or frozen vegetables; 2-3 servings of nonfat milk, yogurt, or cheese; and 2-3 servings of lean meat, poultry, fish, or dry beans.
  • Use olive or canola oils for cooking. These oils contain monounsaturated fats known to lower cholesterol.
  • Eat 2 servings of fish each week. Eat fish such as salmon, mackerel, lake trout, herring, sardines, and albacore tuna. All of these fish are high in omega-3 fatty acids, which lower levels of certain fats in the blood and help prevent irregular heartbeats and blood clots that cause heart attacks.
  • Research suggests that alcohol can help protect against coronary heart disease, but limit your intake to 1-2 drinks per day. Higher amounts can increase blood pressure, cause heart rhythm disorders (arrhythmias), and damage your heart muscle and liver directly.
  • Avoiding fast food may not be pleasant or convenient, but it may provide significant benefit in the long run.

Smoking: Quitting smoking is the single best change you can make.

  • Quitting can be difficult, so seek your health care provider’s help.
  • Passive smoking (breathing in tobacco smoke), smoking cigars, or chewing tobacco are equally dangerous to your health.

Physical inactivity: Exercise helps to lower your blood pressure, increase your level of good cholesterol (HDL), and control your weight.

  • Try to complete an endurance exercise of at least 30 minutes, 3-5 times a week. But just brisk walking alone will improve cardiovascular survival.
  • Exercise can include walking, swimming, biking, or aerobics.
  • Before beginning an exercise program, talk to your health care provider.

Obesity: Excess weight puts extra strain on your heart and blood vessels by increasing blood pressure, plus frequently associated with diabetes, high cholesterol and triglycerides, and low HDL.

  • A high-fiber, low-fat diet and regular exercise can help you lose weight and keep it off.
  • Fad diet programs may be unsafe. Seek your health care provider’s advice before starting any weight loss program.
  • Don’t rely on drugs to lose weight. Certain medicines used for weight loss-for example, Fen-Phen-have been associated with dangerous heart valve damage and other serious medical conditions in some users.

High blood pressure: If you have high blood pressure, your health care provider should treat it aggressively.

Diabetes: Diabetes causes blockage and hardening (atherosclerosis) of blood vessels everywhere in the body, including coronary arteries. Controlling diabetes significantly reduces coronary risk.

  • Proper diet, low salt intake, regular exercise, reduction in alcohol intake, and weight reduction are of paramount importance.
  • If your health care provider prescribes medications, take them faithfully.

Viagra and coronary heart disease: If you intend to use sildenafil (Viagra) for erectile dysfunction, contact your doctor to make sure it is safe for you.

  • If you have a significant coronary blockage, angina or heart attack may occur with use of Viagra.
  • Also, you must avoid taking nitroglycerin in any form-pill, patch, or spray-within 48 hours of taking Viagra. Using Viagra with nitroglycerin may cause dangerously low blood pressure.

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coronary heart disease- medical traetment

by admin on November 24, 2008

Medical Treatment

Coronary artery disease decreases blood supply to the heart from the blocked coronary artery. The lower blood flow may fail to meet the heart’s demand for oxygen. Treatment aims to balance blood supply to the heart with heart oxygen demand, and prevent worsening of coronary heart disease.

Aspirin: When taken daily or every other day, aspirin reduces the risk of developing angina or heart attack by reducing the tendency of your blood to clot.

  • It reduces the chance that a clot will form over a rupturing plaque in the coronary artery, a common underlying phenomenon in heart attack (myocardial infarction).
  • Side effects of aspirin include ulcers or bleeding problems.
  • Talk to your health care provider before starting aspirin.

Beta-blockers: Beta-blockers decrease your heart rate and blood pressure, thus reducing your heart’s demand for oxygen. Clinical trials have shown prevention of future heart attacks and sudden death.

Nitroglycerin: This medication reduces chest pain both by decreasing your heart’s oxygen demand and by dilating the coronary arteries, increasing the oxygen supply.

  • Sprays or tablets placed under your tongue are designed to be taken when you need instant relief from angina.
  • Long-acting nitroglycerin tablets or skin patches work slowly over many hours.

Calcium channel blockers: Calcium channel blockers dilate the coronary arteries to improve blood flow. They also reduce blood pressure, and slow heart rate.

ACE inhibitors: Angiotensin-converting enzyme (ACE) inhibitors work by dilating blood vessels, increasing blood flow.

  • They recently have been shown to reduce the numbers of cardiac events, heart attacks, and deaths in people with coronary heart disease, unrelated to their blood pressure lowering effect. Therefore, additional beneficial tissue effects on blood vessels and heart muscle is thought to occur.
  • They are immensely useful in people with diabetes and those with weakened heart muscles.

Statins: Statin drugs work by reducing the amounts of lipids (cholesterol and other fats) in your blood.

  • This changes the inner lining of the blood vessels so plaques are less likely to form or get large.
  • They slow or stop the progression of coronary heart disease and also deter repeat heart attacks.
  • Recently, clinical trials have shown beneficial effects immediately after a heart attack or threatened heart attack, even before the fat lowering effect is maximal, meaning they stabilize the plaque.
  • Examples include atorvastatin (Lipitor), pravastatin (Pravachol), simvastatin (Zocor), lovastatin (Mevacor), and rosuvastatin (Crestor).

Invasive procedures:

When angina symptoms worsen despite medications, you may need an invasive procedure in the cardiac catheterization lab to clear the blocked artery. These procedures are performed by a cardiologist, not a cardiac surgeon, and have fewer complications.

Coronary angioplasty (PTCA): This procedure is similar to coronary angiography (cardiac catheterization or a dye study to visualize the inside of coronary arteries) but is therapeutic as well as diagnostic.

  • A similar but sturdier tube (guide catheter) is inserted into an artery in your groin or arm, and a hair-thin guide wire is threaded through it into your coronary artery.
  • A much thinner catheter is threaded over the guide wire into the blocked artery.
  • This thinner catheter has a tiny balloon at the end.
  • Once the balloon is positioned at the blockage, the balloon is inflated to widen your artery and improve blood flow. The plaque is still there, just flattened against the wall of the artery.
  • The balloon catheter is then withdrawn.
  • This procedure is sometimes referred to as PTCA, which stands for its full formal name: percutaneous (through the skin) transluminal (through the hollow center of the blood vessel) coronary angioplasty.

Stent: A stent is a small, sieved, coil-like metallic tube or scaffold mounted over a balloon.

  • The balloon is inflated at the blockage, which expands the stent.
  • The balloon is then withdrawn, but the stent stays in place, keeping the artery from narrowing again.
    Like arteries treated with angioplasty alone, arteries treated with a stent can eventually close up again.
  • The stent is a longer lasting solution for many people.

Atherectomy: Sometimes the plaques become too rigid, bulky, or calcified to be treated with angioplasty or a stent.

  • In such cases, the plaques must be removed by cutting with a drill-like device.
  • This works only if the narrowing or blockage is limited to a relatively small and self-contained portion of an artery.
  • Devices commonly used for atherectomy include directional atherectomy (DCA) catheter, rotational atherectomy or rotablator (PTRA), transluminal extraction catheter (TEC), or AngioJet.
  • Plaques also may be burned away with an excimer laser atherectomy (ELCA).

Brachytherapy: Radiation is applied to the blockage to clear it.

  • The radiation comes from a very tiny source placed inside or near the artery.
  • This procedure is used to treat arteries that have undergone angioplasty or stenting but have blockage that keeps coming back (restenosis).

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When to Seek Medical Care for coronary heart disease

by admin on November 24, 2008

When to Seek Medical Care
Call your health care provider if you notice any of the following symptoms, which suggest angina:

  • Chest pain, pressure or feeling of indigestion after physical exertion, which may or may not be relieved by rest
  • Shoulder or arm pain involving left, right, or both sides during physical or mentally stressful activity
  • Jaw pain, unexplained by another cause, like a sore tooth
  • Shortness of breath after exertion or walking uphill
  • Fainting spell
  • Pain in the upper part of your abdomen
  • Unexplained nausea, vomiting, or sweating
  • Palpitations or dizziness

Call 911 or have someone take you immediately to a hospital emergency department if you have signs of a heart attack.

  • The most crucial factor is time. Each year, thousands of Americans die because they do not seek medical attention quickly.
  • Err on the side of caution and go to the hospital.
  • This may prove to be the difference between life and death.

The most common symptoms of heart attack include the following:

  • Unremitting or prolonged chest pain, chest pressure, or a feeling like heartburn
  • Shoulder or arm pains (left or right) or upper abdominal pain that won’t go away
  • Shortness of breath after minimal activity or while resting
  • Blackout spells
  • Unexplained profuse sweating with or without nausea or vomiting
  • Frequent chest pain or discomfort at rest

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Coronary heart disease

by admin on August 16, 2008

Coronary artery disease is a disease of the artery caused by the accumulation of atheromatous plaques within the walls of the arteries that supply the myocardium. Angina pectoris (chest pain) and myocardial infarction (heart attack) are symptoms of and conditions caused by coronary heart disease.

Over 451,000 Americans die of coronary heart disease every year. In the United Kingdom, 101,000 deaths annually are due to coronary heart disease.

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