Mid Systolic Click Lesson #639

patient thorax when auscultating by stethoscope

patient position during auscultation
The patient was supine during auscultation.


The mid-systolic click is usually created by the sudden prolapse of the mitral valve leaflet into the left atrium. The anatomy video illustrates this mitral valve posterior leaflet prolapse.

Listen to the recording of a mid-systolic click recorded at the apex. The first and second heart sounds are normal, and no murmur is present.

In some cases, a late systolic murmur follow the mid-systolic click.



Mid Systolic Click

Play the animation and observe that the mitral valve posterior leaflet prolapses. The mid-systolic click is produced by the sudden prolapse of the leaflet.
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