Heart attack: A heart attack, also known as a myocardial infarction (MI), occurs when the blood flow to a part of the heart muscle becomes blocked. The lack of blood flow can cause the affected heart muscle to be damaged or die if not treated promptly. Heart attacks are a medical emergency and require immediate medical attention. Here are some key points about heart attacks: Causes: Coronary Artery Disease (CAD): Most heart attacks are caused by CAD, where the coronary arteries, responsible for supplying blood to the heart muscle, become narrowed due to the buildup of plaque (cholesterol, fat, and other substances). Blood Clot: A heart attack can occur if a blood clot forms and blocks the narrowed artery, cutting off blood supply to the heart muscle. Heart attack Symptoms: Chest Pain or Discomfort: This is the most common symptom. It may feel like pressure, fullness, squeezing, or pain in the center of the chest that lasts for several minutes or goes away and comes b...
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