A 63-year-old woman was admitted because of dyspnea on minor exertion. Echocardiography uncovered a left atrial tumor measuring 4×5 cm. The diagnosis was confirmed by the transesophageal approach: the tumor (arrow) arose from the interatrial septum and protruded into the left ventricle (LV) during diastole (A). Right heart catheterization revealed moderate pulmonary hypertension: mean pulmonary artery pressure was increased to 36 mm Hg. The levophase of a pulmonary artery contrast medium injection unmasked the tumor (arrows) as a large left atrial filling defect (B). The tumor was surgically removed (C), and the suspected diagnosis of left atrial myxoma was histologically confirmed. The polypous tumor was attached to the interatrial septum by a short stalk (heavy arrow). Mechanical stress at the apical site led to calcification (light arrows).
The editor of Images in Cardiovascular Medicine is Hugh A. McAllister, Jr, MD, Chief, Department of Pathology, St Luke's Episcopal Hospital and Texas Heart Institute, and Clinical Professor of Pathology, University of Texas Medical School and Baylor College of Medicine.
Circulation encourages readers to submit cardiovascular images to Dr Hugh A. McAllister, Jr, St Luke's Episcopal Hospital and Texas Heart Institute, 6720 Bertner, MC 4-265, Houston, TX 77030.
- Received January 30, 1995.
- Accepted May 25, 1995.
- Copyright © 1996 by American Heart Association