What are the causes for the heart attack?

Answer 1

A heart attack happens if the flow of oxygen-rich blood to a section of heart muscle suddenly becomes blocked. Most heart attacks occur as a result ofcoronary heart disease (CHD).CHD is a condition in which a waxy substance called plaque builds up inside of the coronary arteries. These arteries supply oxygen-rich blood to your heart.

When plaque builds up in the arteries, the condition is called atherosclerosis. The buildup of plaque occurs over many years.

Eventually, an area of plaque can rupture (break open) inside of an artery. This causes a blood clot to form on the plaque's surface. If the clot becomes large enough, it can mostly or completely block blood flow through a coronary artery.

If the blockage isn't treated quickly, the portion of heart muscle fed by the artery begins to die. Healthy heart tissue is replaced with scar tissue. This heart damage may not be obvious, or it may cause severe or long-lasting problems.

Answer 2

There are several causes of heart attack. Some of the common causes include coronary Heart disease, (previous) heart attack, cardiovascular disease, pulmonary heart disease and angina. Factors such as poor diet, lack of exercise, obesity and smoking. A spasm coronary artery can also lead to a heart attack.

Hope this helps.