Late coronary spasm complicating successful angioplasty of the left main coronary artery.

A patient with successful percutaneous transluminal coronary angioplasty of the left main coronary artery is described. Two days later coronary angiography was performed because of recurrence of angina pectoris. Spontaneous spasm at the angioplasty site was documented. This potentially lethal complication issues a severe warning against angioplasty of the left main trunk.