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Myocardial infarction; Other names: Acute myocardial infarction (AMI), heart attack: A myocardial infarction occurs when an atherosclerotic plaque slowly builds up in the inner lining of a coronary artery and then suddenly ruptures, causing catastrophic thrombus formation, totally occluding the artery and preventing blood flow downstream to the heart muscle.
In 2021, the American Heart Association clarified that "heart attack" is often mistakenly used to describe cardiac arrest. While a heart attack refers to death of heart muscle tissue as a result of blood supply loss, cardiac arrest is caused when the heart's electrical system malfunctions. Furthermore, the American Heart Association explains ...
Coronary thrombosis is defined as the formation of a blood clot inside a blood vessel of the heart. This blood clot may then restrict blood flow within the heart, leading to heart tissue damage, or a myocardial infarction, also known as a heart attack.
A heart attack happens when blood flow to the heart is blocked or severely reduced, according to the CDC. The most common cause of heart attack is coronary artery disease (CAD), which happens when ...
Most heart attacks are caused by atherosclerosis. Other causes include a blood clot that travels from elsewhere, a spasm, or a tear in a coronary artery.
The number of young people having a heart attack has been rising by 2 per cent each year for the last 10 years.