Left main coronary artery stenosis after percutaneous transluminal coronary angioplasty.

Abstract Percutaneous transluminal coronary angioplasty (PTCA) is an accepted technique in the treatment of discrete proximal coronary artery lesions. We report on 3 patients undergoing PTCA without left main (LM) coronary artery stenosis. Each subsequently developed new severe LM coronary artery stenosis during or after PTCA. The new disease in the LM coronary artery suggests that instrumentation during the procedures may have contributed to the early development of these lesions.