Two dimensional echocardiographic evaluation of exercise-induced left and right ventricular asynergy: Correlation with thallium scanning |
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Authors: | Gerald Maurer Navin C Nanda |
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Institution: | From the Cardiology Unit, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York USA |
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Abstract: | Adequate real time two dimensional echocardiograms were prospectively obtained before and immediately after graded treadmill exercise testing in 41 of 48 patients who underwent cardiac catheterization for suspected coronary artery disease. Findings were correlated with thallium perfusion scans performed 5 to 10 minutes and 3 hours after the same exercise test. Exercise-induced wall motion abnormalities were detected in 19 of 23 patients with significant coronary artery disease and no prior myocardial infarction as well as in all 5 patients with known previous infarction. Three patients with coronary artery disease experienced new isolated right ventricular asynergy with exercise that would have been missed if only the left ventricle had been evaluated. Exercise-induced thallium perfusion defects showed good correlation with exercise-induced asynergy as detected with echocardiography. Two dimensional echocardiography performed immediately after treadmill stress testing is a feasible and rewarding technique in the evaluation of patients suspected to have coronary artery disease. |
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Keywords: | Address for reprints: Navin C Nanda MD Cardiology Unit—Box 679 University of Rochester Medical Center 601 Elmwood Avenue Rochester New York 14642 |
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