Aspirin for Prevention of Stroke After Endovascular Aortic Arch Repair: a Multicenter, Double-Blind, Randomized Controlled Trial

ABSTRACT Introduction Endovascular aortic arch repair (EAAR) and the endovascular reconstruction of arch branch vessels represent a new trend in managing aortic arch pathologies, due to advantages such as minimal invasiveness, rapid recovery, and fewer complications. However, stroke is a common and serious complication during EAAR procedures. Strategies for its prevention, including the question of whether antiplatelet therapy should be administered postoperatively, have not yet been reported. Methods and analysis This project is designed as a prospective, multicenter, double-blind, randomized controlled trial. Patients undergoing Endovascular Aortic Arch Repair (EAAR) will be randomly assigned to three groups: aspirin treatment for 3 months, 6 months, or 1 year. All three groups will be followed up on for over one year. The primary endpoint is the incidence of postoperative stroke, while secondary endpoints include the patency rate of reconstructed supra-aortic branches, the incidence of major bleeding complications, EAAR-related complications, and the incidence of postoperative cognitive impairment. The study aims to evaluate the efficacy and safety of aspirin in preventing stroke after EAAR. Furthermore, stratified analyses will be conducted based on factors such as reconstruction techniques, the number of reconstructed branch arteries, and the diameter of branch stents to explore their impact on stroke incidence post-EAAR. The clinical utility of aspirin in different subgroups will also be assessed to provide more precise and personalized treatment strategies for clinical practice. Ethics and dissemination This study has been approved by the Western Theater Command General Hospital and will be conducted in accordance with the principles of the Declaration of Helsinki. Ethical approval has been obtained separately from all participating research centers. STRENGTHS AND LIMITATIONS OF THIS STUDY Endovascular aortic arch repair (EAAR) and endovascular reconstruc