Long term outcomes following coronary artery bypass grafting are governed by patency of vascular grafts. In this regard, the use of arterial grafts, (preferably the left internal mammary artery) has demonstrated improved survival relative to venous their counterparts. These benefits are a consequence of greater patency of LIMA at 10 years vis-a-vis venous grafts.Howevr, uncommonly there is a possibility of occlusion of LIMA early in the post operative period due to proecudral reasons.We report an unusual case of late occlusion of LIMA after seven years of CABG.