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Mitral Regurgitation

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

//embedding heart 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

These authors contributed the audio recordings and text found in this reference guide: Jon Keroes, MD,Diane Wrigley, PA, and David Lieberman.
Medically reviewed by Dr. Barbara Erickson, PhD, RN, CCRN.



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