Several studies have shown that postoperative atrial fibrillation (POAF) is associated with poorer short- and long-term outcomes after isolated coronary artery bypass grafting surgery. Nevertheless, there is considerable debate as to whether this reflects an independent association of POAF with poorer outcomes or confounding by other factors.
Saxena, A., Dinh, D., Smith, J., Shardey, G., Reid, C., & Newcomb, A. (2012). Usefulness of postoperative atrial fibrillation as an independent predictor for worse early and late outcomes after isolated coronary artery bypass grafting (Multicenter Australian study of 19,497 patients). American Journal of Cardiology, 109, 219 - 225. https://doi.org/10.1016/j.amjcard.2011.08.033