Coronary Vasospasm as an Unexpected Cause of Intraoperative Hemodynamic Instability and Cardiac Arrest.

We present a case of intraoperative coronary artery vasospasm during thoracic surgery causing profound hemodynamic instability. A 68-year-old man undergoing completion right pneumonectomy exhibited intraoperative widespread ST elevation with associated hypotension. Transesophageal echocardiography performed by the anesthetist revealed hypokinetic apical and lateral walls, prompting transportation to the catheterization laboratory, with angiography demonstrating widespread coronary artery spasm. Intracoronary nitroglycerin relieved the vasospasm; however, heparin administration caused significant postoperative bleeding, resulting in cardiac arrest requiring resuscitation and return to the operating room. He ultimately recovered and was discharged to a rehabilitation facility 3 weeks later.