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A Comparison of Dipyridamole Thallium 201 Scintigraphy and Clinical Examination in the Determination of Cardiac Risk Before Arterial Reconstruction

Department of Vascular Surgery RK. Rigshospitalet

Michael Vissing

Vascular Division, Surgical Department H, Gentofte Hospital

Ole Munck

Department of Clinical Physiology and Nuclear Medicine. Herlev Hospital, University of Copenhagen, Copenhagen, Denmark

Henning Kelbaek

Department of Clinical Physiology and Nuclear Medicine. Herlev Hospital, University of Copenhagen, Copenhagen, Denmark

Preoperative clinical examination, including a 12-lead resting ECG, and pla nar dipyridamole thallium imaging (DTI) were compared in a prospective study of 65 vascular surgical patients in regard to their value for predicting postopera tive cardiac complications. Fifty-three patients underwent abdominal vascular procedures and 12 were operated on for peripheral artery disease.

Thirty-six patients had ischemic heart disease (IHD) and/or abnormal find ings from 12-lead resting ECG. Of these 36 patients, 11 had nonfatal cardiac complications. The remaining 29 patients were free of IHD and had normal results from ECG. No complications occurred among these 29 patients. There was no postoperative death.

Thallium imaging results were abnormal in 45 patients, showing either redis tribution and/or scar tissue or low washout. In 18 of these patients major changes with redistribution were present in all projections. Among these patients, 9 had a nonfatal cardiac complication. In the 27 patients with abnormalities in only one or two projections, only 2 had a cardiac event postoperatively. No cardiac complications occurred in patients with normal thallium scintigraphy findings.

The patients were operated on irrespective of the results of the scans, and all recovered from any cardiac complications that occurred.

In vascular surgical patients with previous IHD and/or abnormal findings from resting ECGs further risk stratification is achieved with DTI.

Angiology, Vol. 43, No. 4, 306-311 (1992)
DOI: 10.1177/000331979204300404


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