Intraoperative coronary artery spasm after off-pump coronary surgery.

Coronary artery spasm is rare after coronary artery bypass surgery. We describe a case of intraoperative severe native coronary artery and graft spasm after successful off-pump coronary bypass surgery in a 55-year-old man, which was detected by suspicious electrocardiographic changes, and documented postoperatively by coronary angiography.