[Cor triatriatum of adults. Apropos of 2 new surgically treated cases in adults].

The authors report two cases of cor triatriatum in a 54 year old woman undergoing open heart surgery with a preoperative diagnosis of mitral stenosis, and a 24 year old woman in whom the diagnosis had been made before surgery. Resection of the abnormal intra-left atrial fibrous membrane successfully restored normal haemodynamics in both cases. The main clinical and diagnostic features of the condition are described.