Heart Attack - Experience

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What is a heart attack?

A heart attack (also known as a myocardial infarction or MI) is the death of heart muscle from the sudden blockage by a blood clot in a coronary artery that supplies blood to the heart. Blockage of a coronary artery deprives the heart muscle of blood and oxygen, causing injury to the heart muscle. Injury to the heart muscle causes chest pain and pressure. If blood flow is not restored within 20 to 40 minutes, irreversible death of the heart muscle will begin to occur. Muscle continues to die for 6 to 8 hours at which time the heart attack usually is "complete." The dead heart muscle is replaced by scar tissue.

Approximately one million Americans suffer a heart attack each year. Four hundred thousand of them die as a result of their heart attack.

Click here to view interactive photos of hearts that have suffered a heart attack.

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