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Coronary artery bypass grafts: improved electron-beam tomography by prolonging breath holds with preoxygenation
C N Enzweiler1, D E Kivelitz, T H Wiese
1Departments of Radiology, Internal Medicine I, and Cardiovascular Surgery, Charité, Humboldt-Universität Berlin, Schumannstrasse 20/21, 10098 Berlin, Germany. christian.enzweiler@charite.de
Radiology
|September 30, 2000
Abstract:
In 45 patients with coronary bypass grafts, the breath-hold interval with and that without preoxygenation was measured. Its effect on depiction of the distal graft anastomosis at electron-beam tomography was evaluated. Preoxygenation prolonged the breath-hold interval in most patients, thereby allowing greater anatomic coverage including more distal anastomoses. Preoxygenation may improve scanning of coronary bypass grafts and increase detectability of graft stenoses.