Coronary artery bypass grafts in the 78 patients of the study.

<p>Distribution of A) internal mammary artery (IMA) grafts and B) saphenous vein (SV) grafts in 78 patients with a total of 254 coronary artery bypass grafts (CABG) scanned with 256-slice MDCT. IMA-LAD indicates simple IMA grafts to the left anterior descending artery, and IMA-SVB, composite IMA with saphenous vein bridge grafts. An IMA-SVB graft redistributes the flow of the IMA to two or more coronary arteries (distal targets) of the anterolateral territory, usually to the left anterior descending artery as well as to one or more diagonal arteries, or to the ramus intermedius artery. A single SV graft has a proximal anastomosis on the ascending aorta, and a distal terminolateral anastomosis on one distal target. A sequential SV graft has a proximal anastomosis on the ascending aorta, and sequential distal anastomoses on two (or more) distal targets: one (or more) laterolateral anastomosis, and a most distal one which is terminolateral. Most patients had both an IMA graft (used as a simple or composite graft) and one (or more) SV graft(s).