Mitral Valve Prolapse

Welcome to our Mitral Valve Prolapse Summary Page. This page provides a definition, a sample mitral valve prolapse heart sound as well as links to other auscultation recordings, lessons and interactive guides.

What is Mitral Valve Prolapse?

Mitral valve prolapse occurs when the two mitral valve flaps do not close evenly. It is commonly caused by small growths of collagen on the valve leaflets. In most cases, it’s harmless.

Many patients with mitral valve prolapse have no symptoms. When symptoms are present, they can include:

  • Chest pain
  • Dizziness
  • Fatigue
  • Sensation of feeling the heart beat (palpitations)
  • Shortness of breath

Mitral Valve Prolapse Murmur

Using the play button on the torso, you can listen to mitral valve prolapse. In this example, it is a medium pitched, diamond shaped murmur which begins right after a mid systolic click and runs to the end of systole. The intensity of the murmur increases and its starting point begins earlier in systole as left ventricular volume decreases (going from supine to standing). The intensity of the murmur and its starting position move later in systole as the volume increases (by raising the legs while in the supine position). The mid-systolic click also moves in tandem with the murmur.

mitral valve prolapse patient with stethoscope

Mitral Valve Prolapse Animation

We have prepared an animation video of mitral valve prolapse. By following the link below, you can see that the murmur is caused by the prolapse of the posterior mitral valve leaflet. The murmur is generated by turbulent flow from the left ventricle into the left atrium.

Mitral Valve Prolapse Animation

Mitral Valve Prolapse - Patient Recordings

Our heart sounds reference guide has additional patient recordings of mitral valve prolapse, including a mild case.

Reference Guide

For more information, lessons and quizzes for heart sounds, visit our page: Heart Sounds