Abstract
One major adverse event of endoscopic sphincterotomy (EST) is bleeding, which could be more common and severe in patients receiving anticoagulant therapy. However, the cessation of anticoagulants for long periods could lead to thromboembolic events. We aimed to evaluate the optimal timing of resumption of anticoagulants after EST in patients at risk for thromboembolism. From January 2010 through October 2017, a retrospective cohort at risk for thromboembolism who had taken warfarin and bridging therapy with heparin around EST from three tertiary hospitals in South Korea was investigated. The primary outcome was to compare the incidence of post-EST delayed bleeding according to the resumption time of anticoagulant. The secondary outcome was to investigate any thromboembolic adverse events related to interruption of the anticoagulant. A total of 96 patients (46 males and 50 females; median age 75years [range, 24-91years]) were enrolled. Overall, the patient numbers of very early (< 24h), early (24-48h), and late resumption (> 48h) of anticoagulant after EST were 56, 23, and 17, respectively. The baseline characteristics were similar between groups except resumption time of anticoagulant. There was no significant difference in the rate of post-EST delayed bleeding (5% in very early group vs. 9% in early group vs. 0 in late group, p = 0.47). The rate of thromboembolic adverse events was significantly higher in the late resumption of anticoagulant group (0 vs. 0 vs. 24%, p < 0.001). There was no significant difference in the incidence of post-EST delayed bleeding according to the resuming time of anticoagulant. Since long cessation of anticoagulant could increase the risk of thrombotic adverse events, the early resumption of anticoagulant seems to be preferred.
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