Mitral Stenosis - Moderate

Unlock lessons, quizzes and more.

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

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

The second heart sound is normal and unsplit

Systole is silent.

There is an opening snap 75 milliseconds into diastole. As mitral stenosis becomes more severe the opening snap will occur earlier in diastole.

The opening snap is followed by a diamond shaped low frequency murmur. Use the bell of the stethoscope to hear this murmur.

There is a second murmur in late diastole due to contraction of the left atrium.

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

Mitral Stenosis - Moderate
The recommended auscultation position for the stethoscope is the Mitral position. For this sound, use stethoscope's Bell.


maneuver
The recommended patient position is Supine left side down

Phonocardiogram

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

Heart Animation

Lessons
left button        right button



Listening Tips
A synopsis of important sound features and timing for this abnormality.
S1: Increased intensity.
Diastole: Opening snap followed by diamond shaped, low pitched murmur.
CaseID97
CourseID27
CourseCaseOrder4
ID87