Postoperative QRS duration to left ventricular end-diastolic diameter ratio as a predictor for the risk of postoperative atrial fibrillation in cardiac surgery: A single-center pro... oleh Bingxin Xie, Wenhua Song, Yingqun Yan, Panagiotis Korantzopoulos, Gary Tse, Huaying Fu, Shuai Qiao, Yongyong Han, Meng Yuan, Qingmiao Shao, Guangping Li, Tienan Chen, Tong Liu