Congenital tricuspid insufficiency.

This is a case report of a 16-year-old male with moderate mitral disease, probably rheumatic, and with severe tricuspid insufficiency, which at surgery appeared to be a congenital malformation of the tricuspid valve (absence of the anterior leaflet). A tricuspid heterograft was successfully inserted. The symptoms of congenital tricuspid insufficiency are discussed, and this entity is differentiated from other causes of tricuspid insufficiency.