Mitral Regurgitation and Aortic Regurgitation

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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).

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


maneuver
The recommended patient position is Sitting leaning forward

Phonocardiogram

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

Heart Animation

Lessons
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Listening Tips
A synopsis of important sound features and timing for this abnormality.
S1: Minimally reduced intensity.
Systole: Rectangular murmur, moderate intensity.
Diastole: Decrescendo murmur, moderate intensity.
CaseID105
CourseID28
CourseCaseOrder5
ID95