A trileaflet "mitral valve" with three papillary muscles: brand new echocardiographic finding.

Congenital mitral valve malformations are rare, but are well known and described entities. Mitral valve malformations involve mitral valve apparatuses (leaflets and annulus) and subvalvar apparatuses ( chordae and papillary muscle). Case reports of accessory mitral leaflets were already described, but were usually an appendix of the normal valve. We describe here a case report and present the images of a trileaflet mitral valve sustained by three papillary muscles in a young girl with subaortic stenosis.