PUBLISHED: 5:17 PM on Tuesday, September 19, 2006
Heart disease and cholesterol
Heart disease is caused by narrowing of the coronary arteries that feed the heart. Like any muscle, the heart needs a constant supply of oxygen and nutrients, which are carried to it by the blood in the coronary arteries.

When the coronary arteries become narrowed or clogged by cholesterol and fat deposits - a process called atherosclerosis - and cannot supply enough blood to the heart, the result is coronary heart disease.

If not enough oxygen-carrying blood reaches the heart, you may experience chest pain called angina. If the blood supply to a portion of the heart is completely cut off by total blockage of a coronary artery, the result is a heart attack. This is usually due to a sudden closure from a blood clot forming on top of a previous narrowing.