Study to evaLuate the effIcacy and Safety of abeLacimab in High-risk Patients With Atrial Fibrillation Who Have Been Deemed Unsuitable for Oral antiCoagulation (LILAC-TIMI 76)

A study to evaluate the effect of abelacimab relative to placebo on the rate of ischemic stroke or systemic embolism (SE) in patients with Atrial Fibrillation (AF) who have been deemed by their responsible physicians or by their own decision to be unsuitable for oral anticoagulation therapy.

• : * Patient is able to understand and has provided written informed consent to participate in the trial * Diagnosed Atrial Fibrillation (AF) or atrial flutter (documented on an electrocardiogram (ECG) or monitor recording) * Age 65-74 and a CHA2DS2VASc ≥4 OR age ≥75 and a CHA2DS2VASc ≥3 * Patient is judged by the responsible physician to be unsuitable for oral anticoagulation because the risks outweigh the benefits or the patient is unwilling to take oral anticoagulation AND this determination was made prior to and independent of the study * At least 1 bleeding risk factor such as severe renal insufficiency, planned daily use of antiplatelet medication for the duration of the trial, history of bleeding from a critical area, or other conditions associated with increased risk of bleeding such as chronic nonsteroidal anti-inflammatory drug (NSAID) use, frailty or multiple falls * Patient is judged by the responsible physician to be unsuitable for left atrial appendage (LAA) closure or occlusion device, an approved device is not available, or the patient is unwilling to undergo the procedure AND this determination was made prior to and independent of the study

Use the source registry for the full inclusion and exclusion criteria before discussing referral or enrolment.