Systolic Murmurs

Mitral Regurgitation Sounds

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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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The recommended auscultation position for the stethoscope is the Mitral position. For this sound, use stethoscope's Diaphragm.

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The recommended patient position is Supine

Phonocardiogram

This waveform plots sound amplitude on the vertical axis against time on the horizontal axis.

Heart Animation

Lessons

1	Innocent Murmur
2	Aortic Sclerosis (Musical Murmur)
3	Aortic Stenosis -Mild
4	Aortic Stenosis - Severe 2
5	Mitral Regurgitation
6	Mitral Valve Prolapse (Click with Late Systolic Murmur)
7	Hypertrophic Cardiomyopathy

Practice Drill

Listening Tips
A synopsis of important sound features and timing for this abnormality.
Systole: Rectangular murmur, mid-frequency.
Diastole: S3 gallop.
Use chestpiece bell to improve S3 sound.

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