Publisher's Synopsis
PREVIEW
A heart attack occurs when the flow of blood to the heart is severely reduced or blocked. The blockage is usually due to a buildup of fat, cholesterol and other substances in the heart (coronary) arteries. The fatty, cholesterol-containing deposits are called plaques. The process of plaque buildup is called atherosclerosis.
Sometimes, a plaque can rupture and form a clot that blocks blood flow. A lack of blood flow can damage or destroy part of the heart muscle.
A heart attack is also called a myocardial infarction.
Prompt treatment is needed for a heart attack to prevent death. Call emergency medical help if you think you might be having a heart attack.
