• Eiji Kuwahara, Yutaka Otsuji, Tatsuru Matsuoka, Shinichi Minagoe, Ryuzo Sakata, and Chuwa Tei.
• First Department of Internal Medicine, Kagoshima University School of Medicine, Japan.
• J Am Soc Echocardiogr. 2002 May 1; 15 (5): 473-4.

AbstractA 65-year-old-man was referred for echocardiographic examination because of palpitations. He had a history of an atrial septal defect surgically treated with an artificial synthetic polyester textile fiber patch. TTE showed a large, mobile mass in a dilated left atrium. The attachment site of the mass was not clear by transthoracic approach, and it was difficult to diagnose the mass as a thrombus or a myxoma from the nature of the echocardiographic findings. Transesophageal echocardiography clearly demonstrated that the mass was attached to the patch closing the atrial septal defect and the mass was confirmed as thrombus at surgery. A patient with left atrial thrombus in whom transesophageal echocardiographic demonstration of the attachment of the left atrial mass to a patch closing an atrial septal defect served as an essential clue leading to accurate diagnosis is reported. Transesophageal echocardiography is feasible to evaluate the attachment site of a left atrial mass and to lead to an accurate diagnosis.

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