Cor triatriatum evaluated by real time 3D TEE.

We present two cases of cor triatriatum, a rare congenital anomaly that consists of a membrane that divides the left atrium into two chambers. The first case involves an older adult man admitted for evaluation of left-sided weakness attributed to stroke. The second is a case of a middle-aged woman with dyspnea. Both patients had transthoracic echocardiograms as a part of their initial evaluation, which revealed abnormal structures in the left atrium, and both subsequently underwent transesophageal echocardiography. During these exams, real-time 3D imaging was utilized to more completely define the pathology.