A Giant Saphenous Vein Graft Aneurysm Causing Left Internal Mammary Artery to Left Anterior Descending Artery Graft Compression

Saphenous vein graft aneurysm is a rare complication after coronary artery bypass surgery. It is defined as a localized dilatation of the vessel to 1.5× the expected normal diameter. We report a case of 67-year-old man who presented with angina 23 years after coronary artery bypass graft. He was found to have a giant saphenous vein graft aneurysm to diagonal artery compressing the left internal mammary artery graft to the left anterior descending artery. The patient underwent aneurysm resection with satisfactory outcome.