Mitral Regurgitation Page


Welcome to the mitral regurgitation page. On this page we provide a definition, sample heart sounds and links to the training lessons available on this site.

What is Mitral Regurgitation?

Mitral regurgitation occurs when the mitral valve fails to close tightly, allowing blood to leak (regurgitation) back into the left atrium. It is the most common valvular disease.

Diagnosis of Mitral Regurgitation

Mitral regurgitation diagnosis may begin with heart auscultation (see below) and then include tests such as EKG, chest x-ray and echocardiogram.

Mitral Regurgitation Heart Sounds Auscultation

In the simulated auscultation case below, the murmur of mitral regurgitation is a mid-frequency, rectangular murmur taking up all of systole. S1 is normal. S2 is single. There is a third heart sound gallop in diastole. Both the left ventricle and the left atrium are enlarged. The murmur is caused by turbulent flow through the incompetent mitral valve leaflets into the left atrium.

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A patient auscultation of mitral regurgitation is also available for listening below.


Listening Tips
layout image
Systole: Rectangular, loud murmur.
S2: Widely split.
Diastole: S3 followed by a diamond shaped, brief murmur.

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