Coronary artery bypass surgery in patients with multivessel coronary artery disease is mandatory surgical technique that can provide complete revascularisation by using arterial conduits and saphenous vein grafts. Multidetector computed tomography coronary bypass angiography has become an important imaging modality for the non-invasive assessment of coronary artery disease. This technique enables to evaluate patency of the native coronary artery and bypass grafts, and helps to identify the main causes of bypass graft occlusion. The literature contains general information about morphological changes of arterial and venous...

A total of 128 patients (110 men, 67.2±8.2 years) with 375 coronary bypass grafts (118 arterial and 257 venous) were examined by a 64-slice CT-bypass angiography (Aquilion 64, Toshiba, Japan) using the following scan parameters: 400 ms gantry rotation time, detector collimation 64х0.5 mm, tube voltage of 120 kV, the pitch was 0.2, scanning time ~ 12-14 sec. Non-ionic contrast agent (Iopamidol 370 mg iodine / ml) was injected using the automatic injector. The contrast injection was administered into the two phase: the first phase...

93 occluded grafts (24.8%) were found, of which 77 venous and 16 arterial. Grafts to the right coronary artery constituted greatest quantity among all occluded venous grafts (n=27; 35%). Venous grafts were closed more frequently during the periods 7-10 years and more than 10 years after surgery (Fig.1). Occluded arterial grafts to the left anterior descending artery constituted greatest quantity in term 6 months-2 years after surgery. Thus, the frequency of vein grafts occlusions was 2.2 times higher than arterial grafts occlusions by comparing their...

The lowest frequency of stenoses and occlusions of both venous and arterial grafts was in period 2-5 years after surgery. Control terms of CT-bypass angiography for patients after bypass surgery are 2 years, 7 and 10 years. The control terms of CT-bypass angiography in patients without ischemia symptoms grounded by different frequency of occurrence of new significant stenoses and occlusions grafts due to changes in the reasons of its development at various stages of the postoperative period. Recurrent angina is an indication for performing CT-bypass...