Abstract:To investigate the effect of different anticoagulation methods on the incidences of perioperative bleeding and thromboembolic events for patients with atrial fibrillation who were using Warfarin and required pacemaker implantation. Methods Fifty patients with atrial fibrillation were included in this study. They were having long-term oral Warfarin therapy and needed pacemaker implantation therapy in our department from January 2015 to August 2016. The patients were divided into two groups according to the preoperative anticoagulation methods, with 25 assigned to normal intensity anticoagulation group and 25 assigned to receive low intensity anticoagulation. The incidences of bleeding and thromboembolic events were compared between the two groups and their relationships with different anticoagulation methods in perioperative period were analyzed. Results The incidence of incision bleeding was 8% in the normal intensity anticoagulation group and 4% in the low intensity anticoagulation group. The incidence of pocket hematoma was 4% in both groups. There were 3 cases complicated with bleeding in the normal intensity anticoagulation group and 2 in the low intensity anticoagulation group without significant difference (p > 0.05). There was no thromboembolic event in either group during perioperative period.Conclusions For patients with atrial fibrillation who take oral Warfarin in long -term and need pacemaker implantation therapy, preoperative normal anticoagulant therapy does not increase the risk of bleeding complications,preoperative low intensity anticoagulation does not increase the risk of thromboembolic events.