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Health A-Z

Medical Content Created by the Faculty of the
Harvard Medical School

Additional Info

American Heart Association
National Center
7272 Greenville Avenue
Dallas, TX 75231
1-800-242-8721
www.americanheart.org

National Institutes of Health
9000 Rockville Pike
Bethesda, Maryland 20892
301-496-4000
www.nih.gov

Date Last Reviewed: 12/4/2013

Date Last Modified: 12/4/2013

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From Health A-Z, Harvard Health Publications. Copyright 2007 by the President and Fellows of Harvard College. All rights reserved. Written permission is required to reproduce, in any manner, in whole or in part, the material contained herein. To make a reprint request, contact Harvard Health Publications. Used with permission of StayWell.

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