Fig. 10

Patent bypass grafts with narrowing at the origin of the vein graft to the circumflex distribution. a Volumetric-rendering in the right anterior oblique demonstrates a vein graft (black arrowhead) coursing from the aorta to the distal right coronary artery. The superior portion of the left internal mammary artery (LIMA) bypass is also visible (white arrowhead). b Volumetric rendering in the left anterior oblique again demonstrates the vein graft (black arrowhead) from the aorta to the distal right coronary artery. The left internal mammary artery (LIMA) bypass (white arrowhead) is seen to course into the anterior interventricular groove where is anastamoses with the left anterior descending artery. A second vein graft (arrow) extends from the aorta to the circumflex territory. c Volumetric rendering in the left lateral projection viewed from a more inferior approach again demonstrates the left internal mammary artery (LIMA) bypass (white arrowhead) to its anastamosis. The anastamosis of a vein graft (arrow) to an obtuse marginal branch of the circumflex artery is visualized. d Curved MIP of the vein bypass to the circumflex artery territory. There is greater than 50% narrowing at the origin of this vein graft (arrow)