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What is a heart attack?
Causes
Signs and Symptoms
Treatment
Preventions
Related
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Privacy Statement
Web site Created by: Wendy Salter, RN
wendysalter@bellsouth.net
Georgia College & State University, Fall
Semester Nursing Informatics Course
12/09/2005
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A
heart attack (myocardial infarction or MI) occurs when one or more of the
coronary arteries are blocked. The coronary supplies oxygen-rich blood to
the heart. A heart blockage occurs when plaque inside a coronary artery
breaks open, which forms blood clot around it.
Plaque is a buildup of cholesterol, white blood cells, calcium, and other
substances in the walls of arteries. The plaque and blood clot will obstruct
blood flow to the heart muscle cells, depriving them of oxygen and other
nutrients. Without blood supply, the heart muscle cells die. If a large area
of the heart is damaged by a heart attack, it can cause sudden death. A
heart attack requires immediate treatment to restore blood flow.
The information on this web site was provided for
informational purposes only and is not a substitute for professional
medical advice. You should not use the information on this web site for
diagnosing or treating a medical or health condition. If you have or
suspect you have a medical problem, promptly contact your professional
healthcare provider.
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