1. Health
Send to a Friend via Email
You can opt-out at any time. Please refer to our privacy policy for contact information.

Acute Myocardial Infarction


Updated October 06, 2012

Definition: A myocardial infarction -- or acute myocardial infarction -- is a complete blockage of the coronary artery, which carries blood to the myocardium (heart muscle wall). The blockage often is a result of a blood clot, but can also be caused by plaque (cholesterol) or other material.

A myocardial infarction leads to heart muscle death and may cause decreased heart output. Victims of acute myocardial infarction are at risk for sudden cardiac arrest and death.

Pronunciation: my-oh-car-dee-all in-farck-shun
Also Known As: AMI or MI, heart attack
  1. About.com
  2. Health
  3. First Aid
  4. Basic First Aid
  5. Glossary
  6. Definition of Heart Attack

©2014 About.com. All rights reserved.

We comply with the HONcode standard
for trustworthy health
information: verify here.