 The Randomized OnOff Bypass ROOBY trial6 showed that, among low-risk patients, the rate of death or major adverse events at 30 days after surgery was similar with off-pump and on-pump CABG, but off-pump CABG was associated with a higher rate of incomplete revascularization at 1 year. Short-term mortality and morbidity after off-pump and on-pump CABG were similar in a recent trial involving 4752 patients with a mixed operative-risk profile the CABG Off- or On-Pump Revascularization Study CORONARY7. 