To investigate the risk factors of new-onset postoperative atrial fibrillation in the elderly patients undergoing off-pump coronary artery bypass grafting.

A total of 156 patients who need selective off-pump coronary artery bypass grafting in the First Affiliated Hospital of Zhengzhou University from June 2017 to June 2018 were selected. According to the occurrence of new-onset postoperative atrial fibrillation, the patients were divided into the AF group (37 cases) and the non-AF group (119 cases). The perioperative clinical data of the two groups were statistically analyzed to study the risk factors of postoperative atrial fibrillation.

In the whole group, 37 cases (23.7%) had postoperative atrial fibrillation. Univariate analysis showed that history of diabetes mellitus(OR=1.726, P=0.037), preoperative left atrial diameter (LAD)≥38mm(OR= 2.632, P=0.001) and mechanical ventilation time(OR=1.692, P<0.018) were correlated with new-onset postoperative atrial fibrillation in elderly patients after off-pump coronary artery bypass grafting. Logistic multivariate regression analysis showed that it is an independent risk factor for new-onset postoperative atrial fibrillation that elderly patients with history of diabetes mellitus, preoperative left atrial diameter (LAD)≥38mm and mechanical ventilation time after off-pump coronary artery bypass grafting.

Preoperative left atrial diameter (LAD) ≥38mm, history of diabetes and prolonged mechanical ventilation are risk factors for new-onset postoperative atrial fibrillation in elderly patients undergoing off-pump coronary artery bypass grafting.

Advanced age; New-onset postoperative atrial fibrillation; Coronary artery bypass grafting; Risk factors