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Step up to a Healthier You with the Haldimand-Norfolk Health Unit

Vascular Disease

What is a Heart Attack?

  • The supply of blood to the heart slows down or is stopped because of a blockage in one of the arteries.
  • The narrowing of arteries due to fatty plaque build-up (atherosclerosis) causes more than 90% of heart attacks.
  • A heart attack may also occur when a coronary artery temporarily contracts or goes into a severe spasm, shutting off the flow of blood to the heart.
  • The length of time the blood supply is cut off and the location of the blockage will determine the amount of damage to the heart.