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Definition of Mitral regurgitation

Mitral regurgitation: Backflow of blood from the left ventricle to the left atrium of the heart due to mitral insufficiency from incomplete closure of the mitral valve.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=4409
Last Editorial Review: 4/4/2004

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