A heart attack occurs when blood flow to the heart muscle is interrupted. Oxygen cannot get to the heart muscle, causing tissue damage or tissue death.

Heart Attack
Heart Attack
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A heart attack may be caused by:

  • Thickening of the walls of the arteries feeding the heart muscle (coronary arteries)
  • Build up of fatty plaques in the coronary arteries
  • Narrowing of the coronary arteries
  • Spasm of the coronary arteries
  • Development of a blood clot in the coronary arteries
  • Embolism that affects the coronary arteries