Acute myocardial infarction is the medical name for a heart attack. A heart disease is a life-threatening condition that occurs when blood flow to the heart muscle is abruptly cut off, causing tissue damage. This is usually the result of a blockage in one or more of the . A blockage can develop due to a buildup of plaque, a substance mostly made of fat, and cellular waste products.While the classic symptoms of a heart attack are chest pain and shortness of breath, the symptoms can be quite varied. The most common symptoms of a heart attack include: