Late coronary aneurysm formation following coronary angioplasty.

In a 38-year-old man with recurrent chest pain 14 months following percutaneous transluminal coronary angioplasty (PTCA) of the left anterior descending coronary artery, two aneurysms were noted at previous PTCA sites without evidence of restenosis. Although the precise mechanism of formation of these aneurysms is not known, it is possible that medial dissection and weakening of the artery provoked aneurysm formation.