Parachute Mitral Valve

 

Image Library Home >>Congenital Disorders >> Parachute Mitral Valve

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At first glance, something seems wrong with the mitral valve. The anterior leaflet is very large and there seems to be hardly any posterior leaflet.

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A color window shows in addition that there is some eccentric mitral regurgitation as well.

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A short axis window in the mid ventricle shows that there is only one true papillary muscle present. As we see in other views, it attaches to the anterior leaflet and a diminutive posterior leaflet.

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The short axis view of the mitral valve shows there hardly is any posterior leaflet at all. There is mitral regurgitation associated with where the anterior leaflet coapts with the posterior part of the mitral annulus.

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The 4 chamber view makes it clear that the single papillary muscle attaches to the anterior leaflet and also has chords to the posterior annulus.

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The somewhat eccentric MR jet reaches always the way back to posterior part of the left atrium.
This case is consistent with a congenital "parachute mitral valve". Other variants have more of a posterior leaflet but the key is the single papillary muscle that sends out chords to both mitral valve leaflets (hence the name parachute).