Abstract: Objective To analyze the influencing factors of atrial fibrillation after pulmonary lobectomy. Methods The clinical data of 328 patients with pulmonary lobectomy in our hospital from February 2013 to February 2017 were retrospectively analyzed. The patients were divided into atrial fibrillation group (132 cases) and control group (196 cases)according to whether atrial fibrillation occurred after pulmonary lobectomy, and the influencing factors of atrial fibrillation after pulmonary lobectomy were analyzed. Results The univariate factor analysis showed that the occurrence of atrial fibrillation after pulmonary lobectomy was related to the patient's age, gender, smoking history, preoperative forced expiratory volume in 1 second vs. forced vital capacity (FEV1%), preoperative lung infection, and postoperative oxygen partial pressure (P＜0.05). Multivariate Logistic regression analysis showed that age > 65 years old, preoperative FEV1%＜70%,preoperative lung infection and postoperative oxygen partial pressure＜100 mmHg were the risk factors for atrial fibrillation after pulmonary lobectomy. The short-term mortality, length of hospital stay, and cost of stay during hospitalization were statistically significantly higher in the atrial fibrillator group than those in the control group (P＜0.05).Conclusion There are many risk factors of atrial fibrillation after pulmonary lobectomy, such as age, pulmonary infection,drop of FEV1% and lower partial pressure of oxygen. These factors should be controlled in order to reduce the incidence of atrial fibrillation after pulmonary lobectomy.

Key words: pneumonectomy, atrial fibrillation, risk factors