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Mitral Stenosis - Severe

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 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.

Auscultation Sounds

auscultation sound from lesson
waveform

Position

Patient position
The patient's position should be supine left side down.

Listening Tips

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

Waveform (Phonocardiogram)



Observe Cardiac Animation

Review the animation and observe 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.
Authors and Sources

Authors and Reviewers


Sources

Return to Reference Guide Index Page
Mitral Stenosis - Severe | Lessons with Audio and Video | #98


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