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Dipyridamole Thallium Scanning in the Evaluation of Coronary Artery Disease in Elective Abdominal Aortic Surgery
Dale J. Strawn, MD;
James M. Guernsey, MD
Arch Surg. 1991;126(7):880-884.
Abstract
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• Dipyridamole thallium scanning was routinely performed on 68 consecutive patients who presented for elective aortic surgery. All 68 patients were judged by clinical assessment to be at low risk for perioperative cardiac complications. In addition, 42 of 68 patients had a history of myocardial infarction, stable angina, or abnormal echocardiographic findings (group 1). Twenty-six of 68 patients did not have a history of myocardial infarction, angina, or abnormal echocardiographic findings (group 2). In group 1, 34 of 42 patients had positive results on dipyridamole thallium scanning, and 15 of these patients were found to have critical coronary artery disease on subsequent cardiac catheterization; nine underwent immediate coronary artery bypass grafting, and six had their coronary artery disease treated medically and their vascular operations cancelled. The remaining 27 patients in group 1 underwent elective operations, with six (22%) of 27 sustaining postoperative cardiac complications. None of the group 2 patients was found to have critical coronary artery disease. All patients in group 2 underwent aortic operation without cardiac complication. Routine dipyridamole thallium scanning detected a 22% (15 of 68) incidence of critical coronary artery disease overall. There was a 36% (15 of 42) incidence of critical coronary artery disease in group 1 patients vs 0% in group 2 patients (95% confidence interval, 21% to 50%). We conclude that the use of dipyridamole thallium scanning in low-risk patients for cardiac screening prior to elective aortic operations is beneficial in selected patients who have a history of myocardial infarction, angina, or abnormal echocardiographic findings, but is not necessary in patients with no history of coronary artery disease.
(Arch Surg. 1991;126:880-884)
Author Affiliations
From the Veterans Affairs Medical Center, Martinez, Calif and University of California, Davis.
Footnotes
Accepted for publication March 9, 1991.
Read before the 98th Annual Meeting of the Western Surgical Association, Scottsdale, Ariz, November 14, 1990.
Reprint requests to Department of Surgery, Veterans Affairs Medical Center, 150 Muir Rd, Martinez, CA 94533 (Dr Strawn).
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