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Why Do Heart Attacks Occur?

Angina is a common predictor of heart attacks. It is a pain the chest usually experienced upon exertion or after eating.

Because there is not sufficient blood reaching the heart, pain occurs due to the atherosclerosis or a narrowing of the arteries.

Most heart attacks are caused by the formation of a blood clot in a coronary artery that has been narrowed by atherosclerosis.

The supply of blood carried by the artery and that portion of the heart subsequently dies because the clot blocks it.

Ventricular fibrillation is what happens mechanically at the time of death from a heart attack. It is an erratic heartbeat that interrupts delivery of oxygenated blood to the brain.

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