Left appendage closure after intracranial hemorrhage: safety, efficacy and timing

Abstract

Abstract Background Oral anticoagulation (OAC) use increases the risk of intracranial hemorrhage (ICH) in patients with atrial fibrillation (AF). Left atrial appendage occlusion (LAAO) is an alternative to OAC, however data about its use in patients with prior ICH is scare and the timing of its performance is controversial. Furthermore, the long-term outcomes in this group of patients have not been described. Objective To evaluate the safety and efficacy of LAAO in patients with non-valvular AF and prior ICH (CHA2SVASc >2) and to determine adequate timing of its performance. Methods The sample was obtained from a cohort of 397 patients with AF in which LAAO was performed between 2009 and 2020. In 115 of these patients, the indication for this procedure was ICH (29.8 %). Patients were divided into two groups: early occlusion (n=68; 59%), in which the procedure was performed before 90 days had elapsed after the bleeding, and late occlusion (n=47; 41%), after 90 days. Results Procedure success was 97% globally. Annual incidence of ischemic events was of 0,6%, with an absolute risk reduction of 5,9% and relative risk reduction of 90,3% compared to the predicted risk by CHA2DS2-VASC score. Regarding major hemorrhagic events, annual incidence was of 4%, with an absolute risk reduction of 3,4% and relative risk reduction of 45% compared to the predicted risk by HASBLED score. There were no significant differences between the procedures performed in patients with history of intracranial bleeding and other indications for the procedure. Early closure (first 90 days after the intracranial hemorrhage) was as safe as late closure, without an increase in in-hospital bleedings or complications. Furthermore, long-term follow-up demonstrated a significant reduction in all-cause mortality (11.76% versus 46.8%; HR 0.2, IC95% 0.07-0.55; p<0.001). compared with late occlusion. Conclusions Left atrial appendage occlusion is an effective and safe treatment option to reduce the risk of ischemic stroke in selected patients with AF patients and history of ICH over mean follow-up of 3 years. Early occlusion seems to be at least as safe and effective as late occlusion and therefore could potentially reduce the rate of complications after ICH in selected patients.Survival and closure timingIschemic and bleeding risk reduction