Mitral Regurgitation and Aortic Regurgitation Auscultation Reference

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heart lung sounds waveform synthetic


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

This is an auscultation example of moderate regurgitation of both the aortic and mitral valves.

The first heart sound is minimally decreased due to minimal closure of the mitral valve leaflets in early systole. The second heart sound is normal.

There is a rectangular murmur which takes up most of systole and a decrescendo murmur which takes up most of diastole. Both murmurs are of moderate intensity.

The combination of the two murmurs creates a to-and-fro sound character.

In the anatomy tab you see an enlarged left atrium and left ventricle.

You see regurgitant turbulent flow into the left atrium from the left ventricle (the systolic murmur) and regurgitant turbulent flow from the aorta into the left ventricular outflow tract (the diastolic murmur).

As you listen to this sound, observe the waveform. This is a graph of sound amplitude (loudness) on the vertical axis vs time on the horizontal axis.

Additional Listening Tips

S1: Minimally reduced intensity.
Systole: Rectangular murmur, moderate intensity.
Diastole: Decrescendo murmur, moderate intensity.

Auscultation Method

The recommended patient position is sitting leaning forward
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 and Aortic 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.

Mitral Regurgitation and Aortic Regurgitation Auscultation Reference