[Kearns-Sayre syndrome and mitral valve prolapse. Description of a clinical case]

We report a clinical case with chronic progressive external ophthalmoplegia, retinal pigmentation and left anterior hemiblock (Kearns-Sayre Syndrome) associated with mitral valve prolapse. The mitral valve prolapse is present in familiar neuromuscular diseases. We think that mitral valve prolapse is expression of diffuse metabolic process of muscular heart in Kearns-Sayre Syndrome.