Coronary artery aneurysm formation after percutaneous transluminal cor
onary angioplasty and directional coronary atherectomy is unusual. We
report the case of a left anterior descending coronary artery aneurysm
that formed in such a patient. The left anterior descending coronary
artery was bypassed and the aneurysm was plicated with the aid of coro
nary angioscopy. The English-language medical literature on the topic
of coronary artery aneurysms is reviewed.