Figure 16c. Preoperative evaluation for aortic valve replacement in an 87-year-old woman with a history of prior CABG. (a) Axial CT image shows a partially enhancing aneurysm of the saphenous vein graft to the left circumflex artery (arrow). (b) Axial CT scan obtained inferior to a shows a larger saphenous vein graft aneurysm to the right coronary artery (arrow). (c) Sagittal volume-rendered image shows the relationship of the superior saphenous vein graft aneurysm to the sternum (arrow).