Perioperative Management of Factor Xa Inhibitors

* Study design This is a multicenter, non-randomized, investigator-initiated prospective cohort study. The study will analyze the bleeding risk and incidence of cardiovascular events according to the discontinuation/resumption of factor Xa inhibitors before and after invasive procedures/surgeries in non-valvular atrial fibrillation patients who are prescribed factor Xa inhibitors for stroke prevention and have minor bleeding risk. * Study population Patients who are over 20 years old, have non-valvular atrial fibrillation, and are taking rivaroxaban, apixaban, or edoxaban (active ingredients), and are facing a procedure defined as having minor bleeding risk. * Study protocol For patients with non-valvular atrial fibrillation who are prescribed rivaroxaban, apixaban, or edoxaban for stroke prevention and are at risk of minor bleeding, when they visit the prescribing physician (physician A) for consultation and to obtain a medical opinion regarding the discontinuation/resumption of the medication in relation to an invasive procedure, the physician will explain the protocol for discontinuing/resuming the medication and provide a written explanation to ensure that the patient fully understands it. In addition, the physician in charge of the procedure (physician B) will be notified that the patient has enrolled in this study and will collect information on 1) the type of surgery or procedure performed, and 2) physician B's opinion on the severity of procedure-related bleeding. Thromboembolic and bleeding events will be assessed through patient follow-up 30 days after the procedure.