Heart and Lung Sounds Reference Guide

Mitral Regurgitation Auscultation Reference

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Lesson

For heart sounds listen to the synthetic sound while reviewing this lesson.

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.

The waveform(s) seen above are a chart of sound amplitude (loudness) on the vertical axis against time on the horizontal axis.

Listening Tips

A summary of the key aspects of this heart or lung sound.
Systole: Rectangular murmur, mid-frequency.
Diastole: S3 gallop.
Use chestpiece bell to improve S3 sound.

Auscultation Method

The recommended patient position is supine

For this sound, use stethoscope's diaphragm The recommended auscultation position for the stethoscope is mitral

Relevant Courses

If you wish to review a complete mobile concerning Mitral Regurgitation Auscultation Reference and related heart sounds, the modules(s) listed below may be useful. Each lesson includes text that explains the auscultatory sound and its clinical significance. The lesson also includes an audio track for playback. A waveform provides a great way to visualize the sounds. Finally, we also include an animation video. For heart sounds, the video illustrates heart muscle and valve movements along with blood flow. For lung sounds, the primary source of the sounds can be seen. Each module also includes a quiz.

Systolic Murmurs

Mitral Regurgitation Auscultation Reference