Heart attack is one of the leading causes of death for men and women. Fortunately, various treatments are available to treat a heart attack that can save life and prevent disability. Seeking immediate medical care at the first sign of symptoms can dramatically increase your chance of survival and recovery. Heart attack, also called myocardial infarction or MI, occurs when the coronary arteries, the blood vessels that supply blood to the heart, are narrowed or blocked. This blockage deprives the heart of blood and oxygen causing damage to the heart muscle.