The average age of people at the time of their first heart attack is 65.5 years for males and 72 years for females. The risk increases as a person ages.

Although having a heart attack is uncommon when a person is young, the American College of Cardiology states that people under 40 are now experiencing heart attacks more often, with a 2% increase over the last decade.

A heart attack, or myocardial infarction, occurs when there is a loss of blood supply to the heart muscle, usually due to a blockage. When this happens, the heart does not get enough oxygen and blood.

Without treatment, the damage to the heart muscle becomes irreversible and leads to a heart attack.

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