Cor triatriatum: the utility of cardiovascular imaging.

A 44-year-old man with no known cardiac history presented with worsening dyspnea on minimal exertion. During follow-up, computed tomography angiography and echocardiography confirmed the incidental finding of cor triatriatum. As improvements in spatial and temporal resolution continue, cardiac computed tomography may become better suited to the dynamic imaging of anatomical defects in the heart, including, but not limited to, coronary artery disease.