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Mitral Regurgitation

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.

Auscultation Sounds

auscultation sound from lesson
waveform

Position

Patient position
The patient's position should be supine.

Listening Tips

Systole:Rectangular murmur, mid-frequency
Diastole:S3 gallop
Features:Use chestpiece bell to improve S3 sound

Waveform (Phonocardiogram)



Observe Cardiac Animation

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.
Authors and Sources

Authors and Reviewers


Sources

Return to Reference Guide Index Page
Mitral Regurgitation | Lessons with Audio and Video | #91


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