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Despite the well-established benefits in patients with nonvalvular atrial fibrillation (NVAF), anticoagulants have been underused in elderly patients. The All Nippon AF In the Elderly (ANAFIE) Registry is a multicenter, prospective, observational study with 2-year follow-up of Japanese patients aged ≥75 years with a definitive diagnosis of NVAF, aiming to collect detailed information on clinical status and therapeutic challenges in this patient population.Methods and Results:Patients were enrolled from October 2016 to January 2018. A total of 32,726 patients (57.2% male) were included. The average age, CHADS 2 score, and creatinine clearance were 81.5±4.8 years (26.2% of patients were aged ≥85 years), 2.9±1.2, and 48.4±21.8 mL/min, respectively. Paroxysmal AF was the most common clinical AF type (42.0%), and most patients (97.2%) had comorbidities. Most patients (91.9%) were receiving anticoagulant therapy; of these, 27.8% and 72.2% were treated with warfarin and direct oral anticoagulants, respectively. The average number of concomitant drugs used was 6.6±3.2, including anticoagulants.

Baseline Demographics and Clinical Characteristics in the All Nippon AF in the Elderly (ANAFIE) Registry