Chronic dissection of internal mammary artery graft

We report a case of internal mammary artery graft dissection. Cardiac catheterization showed a spiral dissection in the anastomotic site of internal mammary artery graft with TIMI 3 flow. Percutaneous stenting for native coronary artery lesions was performed. Cardiac catheterization, performed 2 years after the stenting, showed no change in the internal mammary artery dissection. This is the first case of unhealed chronic dissection of internal mammary artery graft.