ABSTRACT
Coronary artery aneurysms are detected rarely during coronary angiography, and are associated with injury to the mechanical vessel wall during percutaneous coronary intervention. Potential causes also include atherosclerosis, congenital defects, connective tissue disorders, vasculitis, infection, drug-related injury, and trauma; it can also be idiopathic. The complications of coronary artery aneurysms vary, but they rupture only rarely. However, there is no consensus treatment strategy for coronary artery aneurysm after coronary intervention. We report a case of a 55-year-old male who developed a coronary artery aneurysm and in-stent restenosis after percutaneous coronary intervention with a drug-eluting stent. The aneurysm was treated successfully with the implantation of a graft stent.