Coronary bypass grafts patency assessment using multislice computed tomography in the early and late periods after bypass surgery

Abstract

Aim TTo evaluate the possibilities of multislice computed tomography (MSCT) in coronary bypass grafts patency assessment in patients with high surgical risk in early and late postoperative period. To determine the high risk time period for coronary bypass grafts occlusion.

Materials and methods. 185 patients with multivessel coronary artery disease and high surgical risk were included in the study. All patients underwent MSCT-angiography in 1.5–3 months and 9–12 months after coronary bypass grafting.
Results. 327 coronary bypass grafts (244 venous and 83 mammary) were analyzed. 1 mammary graft occlusion and 53 venous grafts occlusion, 16 significant stenoses and 5 nonsignificant stenoses were detected in 1.5–3 months after surgery. In 9–12 months after coronary bypass grafting 23 venous grafts occlusion and 1 significant stenosis were detected in addition to first computed tomography study. No new occlusion and significant stenosis were found in the second study.
Conclusions. Most of coronary bypass graft occlusions and stenoses were found in 1.5–3 months after surgery comparing with 9–12 months time period. The study showed high frequency of venous grafts stenoses and occlusions comparing to mammary grafts.