Over the past decade, there has been a marked increase in the use of arterial conduits to perform coronary artery bypass grafting (CABG).1 The clinical and survival benefits of bilateral internal thoracic artery grafts have established them as conduits of first choice for CABG,2 whereas the radial artery has rapidly become the third most commonly used arterial conduit.3 The radial artery is a versatile conduit, which can be harvested easily and safely, has handling characteristics superior to those of other arterial grafts, and comfortably reaches any coronary target. Several studies3 have reported superior patency of radial artery grafts compared with vein grafts at up to 5 years after CABG. Enthusiasm for widespread use of the radiPHENOXYBENZAMINE PREVENTS SPASM IN RADIAL ARTERY CONDUITS FOR CORONARY ARTERY BYPASS GRAFTING