Abstract
Classic cor triatriatum sinistrum is a rare cardiac malformation to be found in the adult. One year after surgical correction of an atrial septal defect in a 55‐year‐old man, cor triatriatum sinistrum was diagnosed by transesophageal echocardiography. We compared transthoracic echocardiography, transesophageal echocardiography, and cardiac catheterization to dynamic three‐dimensional echocardiography (3‐D echo) which offers a new, noninvasive approach to determine the opening size between the accessory and the true left atrium. The findings by 3‐D echo, confirmed by left heart catheterization, showed that the accessory membrane was not stenosing. Surgical correction was therefore not indicated in this patient.
Keywords: dynamic three‐dimensional echocardiography, cor triatriatum sinistrum
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