Stefan Martinoff, MD1

We evaluated the accuracy of the 64-slice computed tomography (CT) angiography scanner in subjects who were scheduled to undergo invasive angiography for possible stenosis in coronary artery bypass grafts. Results showed that the improved resolution of CT scanners with 64-slice technology allowed for a precise delineation of bypass graft occlusion or stenosis. It permitted an accurate noninvasive assessment of bypass grafts, even in subgroups of subjects with suboptimal scan conditions, such as those with arrhythmias or higher heart rates.