Coronary insufficiency after reconstruction of the aortic root is an uncommon but acutely life-threatening occurrence. This lethal condition may present with difficulty in weaning from cardiopulmonary bypass; echocardiographic signs of major wall motion abnormalities; and electrocardiographic evidence of ischemia, pump failure, and ventricular arrhythmias. Rescue CABG in this situation is life-saving. Immediate rescue CABG should be performed if coronary ischemia is suspected after composite graft replacement of the aortic root.