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How does mitral valve prolapse happen?

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The mitral valve is a valve that lets blood flow from one chamber of the heart, the left atrium, to another called the left ventricle. In mitral valve prolapse, part of the mitral valve slips backward loosely into the chamber called the left atrium. This happens when the main heart muscle, called the left ventricle, squeezes during each heartbeat. Mitral valve prolapse differs from mitral valve stenosis. In mitral valve stenosis, the mitral valve is stiff and constricted. In mitral valve prolapse, the valve slips backward because of the abnormal size of or damage to the mitral valve tissues. For most people with mitral valve prolapse, the cause is unknown. Mitral valve prolapse can run in families. It can also be caused by conditions in which cartilage is abnormal (connective tissue disease). Nearly 8 million people in the U.S. have mitral valve prolapse.

From: Mitral Valve Prolapse WebMD Medical Reference

SOURCES:

Freed, L. , 1999; vol 341: pp 1-7. New England Journal of Medicine

Flack, J. , 1999; vol 138: pp 486-492. American Heart Journal

Bonow, R. , 2008; vol 118: pp 523-661. Circulation

Boudoulas, H. 1989; vol 118: pp 796-818. American Heart Journal,

Avierinos, J. , 2002; vol 106: pp 1355-1361. Circulation

Wilson, W. 2007; vol 116: pp 1736-1754. Circulation,

Vahanian, A. 2007; vol 28: pp 230-268. European Heart Journal,

Libby, P. 8th edition, Saunders Elsevier, 2007. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine,

Delling, F. , 129: pp 2158-2170. Circulation

Reviewed by James Beckerman on November 8, 2017

SOURCES:

Freed, L. , 1999; vol 341: pp 1-7. New England Journal of Medicine

Flack, J. , 1999; vol 138: pp 486-492. American Heart Journal

Bonow, R. , 2008; vol 118: pp 523-661. Circulation

Boudoulas, H. 1989; vol 118: pp 796-818. American Heart Journal,

Avierinos, J. , 2002; vol 106: pp 1355-1361. Circulation

Wilson, W. 2007; vol 116: pp 1736-1754. Circulation,

Vahanian, A. 2007; vol 28: pp 230-268. European Heart Journal,

Libby, P. 8th edition, Saunders Elsevier, 2007. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine,

Delling, F. , 129: pp 2158-2170. Circulation

Reviewed by James Beckerman on November 8, 2017

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What are the symptoms of mitral valve prolapse?

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