In a 62-year-old woman with a history of angina pectoris (New York Heart Association functional class 3) for 15 years, the stress exercise test revealed a significant ST-segment depression in leads V5 and V6. Coronary angiography showed the coronary arteries to be normal in diastole (A). In systole, however, a muscle bridge occluding the left anterior descending artery was observed (B). At operation, the muscle bridge over the middle third of the left anterior descending artery was transsected (C). Postoperatively, the patient is free of angina pectoris, and the stress exercise test is normal.
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The editor of Images in Cardiovascular Medicine is Hugh A. McAllister, Jr, MD, Chief, Department of Pathology, St Luke’s 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.
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