Mitral Stenosis - Severe Auscultation Reference

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heart lung sounds waveform synthetic

Lesson

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

This is an example of severe mitral stenosis which is most commonly due to rheumatic heart disease.

The first heart sound is decreased in intensity due to severe thickening of the the mitral valve leaflets.

The second heart sound is normal and unsplit

Systole is silent.

There is an opening snap 50 milliseconds into diastole. As mitral stenosis becomes more severe the opening snap will occur earlier in diastole.

The opening snap is followed by a low frequency murmur which occupies the remainder of diastole. The first two thirds of the murmur is diamond shaped and the remainder is a crescendo. Use the bell of the stethoscope to hear this murmur.

In the animation you can see the turbulent blood flow from the left atrium into the left ventricle. You can see the severely thickened mitral valve leaflets and the markedly enlarged left atrium. The excursion of the mitral valve leaflets is severely reduced.

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.
S1: Decreased intensity.
Diastole: Opening snap then diamond shaped low pitch murmur.

Auscultation Method

maneuver
The recommended patient position is supine left side down
torso
For this sound, use stethoscope's bell The recommended auscultation position for the stethoscope is mitral



Relevant Courses

If you wish to review a complete mobile concerning Mitral Stenosis - Severe 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 Stenosis - Severe Auscultation Reference







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