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Ann Thorac Surg 1979;28:522-529
© 1979 The Society of Thoracic Surgeons

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Articles

Radionuclide Assessment of Aortocoronaiy Bypass Surgery

From the Department of Medicine, University of Manitoba, Winnipeg, Canada, and the Departments of Medicine and Medical Biophysics, Hebrew University of Jerusalem, Israel.

Accepted for publication March 6, 1979.

^* Address reprint requests to Dr. Corne, Section of Cardiology, Health Sciences Centre, 700 William Ave, Winnipeg, Manitoba, Canada R3E OZ 3.

Rest and exercise thallium 201 myocardial scintigraphy and multiple gated radionuclide angiography were correlated with the results of clinical status, exercise electrocardiography, coronary arteriography, and contrast left ventriculography in a series of 12 prospectively studied consecutive patients before and after aortocoronary bypass operation.

Patients were divided into two groups based on a comparison between preoperative and postoperative ²⁰¹Tl scintigrams. Group 1 (6 patients) demonstrated improved or normal postoperative perfusion scintigrams and excellent correlation between the site of a patent graft and the improvement in myocardial perfusion on the postoperative exercise scintigrams. Regional wall motion remained normal in 3 patients and improved in 3. In Group 2 (6 patients) the postoperative ²⁰¹Tl scintigrams were unchanged or worse. Each patient demonstrated graft occlusion, graft stenosis, distal disease, or a perioperative myocardial infarction. No improvement in regional wall motion occurred in 4 of these 6 patients. Neither the symptomatic response to aortocoronary bypass operation nor the response to exercise testing successfully predicted graft patency.

This article has been cited by other articles:

				A. J. Roberts Perioperative Myocardial Infarction and Changes in Left Ventricular Performance Related to Coronary Artery Bypass Graft Surgery Ann. Thorac. Surg., February 1, 1983; 35(2): 208 - 225. [Abstract] [PDF]