Subacute left main coronary stenosis following percutaneous transluminal coronary angioplasty.

Subacute left main coronary stenosis following percutaneous transluminal coronary angioplasty (PTCA) is an uncommon but recognized complication of the procedure. This report describes a case of left main coronary stenosis, which occurred 6 months following PTCA of an angulated, eccentric, proximal (adjacent to the left main stem) left anterior descending artery stenosis. Angiographically demonstrated morphology of complicated coronary stenosis adjacent to the left main coronary artery may represent a risk factor threatening major complications of PTCA. Detailed evaluation of angiographic coronary anatomy may improve patient selection and reduce the likelihood of such complications.