Characterization of Antithrombotic Regimens for Patients with Nonvalvular Atrial Fibrillation and Obesity Discharged from Cardiology Wards.

Background: Despite data derived from observational studies, optimal anticoagulation strategies have yet to be established for patients with nonvalvular atrial fibrillation and obesity.

Objective: To describe direct oral anticoagulant (DOAC) regimens prescribed for adult patients with nonvalvular atrial fibrillation who weighed more than 120 kg.

Methods: This single-centre, retrospective cohort study, conducted in the Saskatchewan Health Authority - Regina Area, involved adult patients with body weight greater than 120 kg who had an indication for oral anticoagulation to treat nonvalvular atrial fibrillation and were discharged by a cardiologist between June 2019 and July 2021.

Results: A total of 62 patients were included (median weight 135 kg). At discharge, DOACs were prescribed for 57 (92%) of the patients and warfarin for 5 (8%). In numeric terms, patients receiving warfarin were at higher risk of thromboembolism or thrombosis; however, the small sample size limited the ability to draw conclusions.

Conclusions: Practice patterns in the Saskatchewan Health Authority - Regina Area indicated substantial use of DOACs for patients with body weight greater than 120 kg; however, for those with the highest weights, warfarin was still in use.