Osmosis video - Myocardial infarction

Myocardial infarction (MI), also known as a heart attack, occurs when the blood supply to part of the heart muscle is blocked. This is usually caused by a buildup of fatty deposits in the lining of an artery that supplies blood to the heart, a process called atherosclerosis. Symptoms of MI include crushing chest pain or pressure that might radiate up to the left arm or jaw, sweating, nausea, and dyspnea. Treatment of MI includes re-establishing blood flow using medications, angioplasty, or percutaneous coronary intervention.