“…Potential reasons for this disparity could be that previous trials included a significant proportion of patients undergoing surgery for valvular heart disease (N 50% of the patients), with a lower proportion of patients placed on beta blockers (b 50% of the patients) and differences in dosing strategies that might have influenced the outcomes. Furthermore, propranolol, metoprolol and bisoprolol may not have the same efficacy for reducing post CABG AF: Acikel et al have found that carvedilol is more effective then metoprolol in these settings [23]. Hence, this study might offer an advantage in comparison with previous studies, since all subjects included in this trial are coronary patients and most of them (80%) were placed preoperatively on beta blockers.…”