Mitral regurgitation overview
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Varun Kumar, M.B.B.S.; Lakshmi Gopalakrishnan, M.B.B.S.
Overview
Mitral regurgitation (MR), mitral insufficiency or mitral incompetence is a disorder of the heart in which the mitral valve does not close properly when the heart pumps out blood. It is the abnormal leaking of blood from the left ventricle, through the mitral valve, and into the left atrium, when the left ventricle contracts, i.e. there is regurgitation of blood back into the left atrium.[1] MR is the most common form of valvular heart disease.[2] Diseases that weaken or damage the valve or the heart tissue around the valve cause mitral regurgitation. After age 55, some degree of mitral regurgitation is found in almost 20% of men and women who have an echocardiogram.
During systole, contraction of the left ventricle causes abnormal backflow (arrow) into the left atrium.
1 Mitral valve
2 Left Ventricle
3 Left Atrium
4 Aorta
References
- ↑ Mitral valve regurgitation at Mount Sinai Hospital
- ↑ Weinrauch, LA (2008-05-12). "Mitral regurgitation - chronic". Medline Plus Encyclopedia. U.S. National Library of Medicine and National Institutes of Health. Retrieved 2009-12-04.