[Severe Coronary Artery Spasm after Coronary Artery Bypass Grafting;Report of a Case].

Coronary artery spasm after coronary artery bypass grafting(CABG) is rare and often fatal. There is no established treatment for perioperative coronary spasm because of the rare and not fully understood complications. We report a 67-year-old male, who experienced perioperative spasm of native coronary arteries and the left thoracic artery graft following CABG. Several transcatheter intracoronary injections of isosorbide sulfate failed to relieve the spasm completely. After 5 days' circulatory support with intra-aortic balloon pumping, the cardiac function improved and the patient recovered. Echocardiography performed before discharge showed decreased left ventricular systolic function with apical akinesis. Postoperative coronary angiography revealed 4 of the 5 grafts were patent.