Summary: In this report, a rare case of tricuspid stenosis uncomplicated by other valve lesions is presented, with clinical, hemodynamic, echocardiographic, and angiographic studies. The patient was markedly incapacitated, mostly as a result of a restricted cardiac output. Tricuspid commissurotomy was performed, with a stenotic deformity of a bicuspid atrioventricular valve, probably of congenital origin, found at surgery. Considerable improvement was observed, notwithstanding the persistence of some signs of residual tricuspid obstruction as a result of an incomplete commissurotomy, to avoid increasing the slight degree of preexistent valvar regurgitation.
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