Comparative Analysis of Anticoagulation Versus Combination Anticoagulation and Antiplatelet Therapy in Atrial Fibrillation Patients Presenting With Gastrointestinal Bleeding.

Abstract

Patients with atrial fibrillation (AF) taking antithrombotic (AT) therapy are at increased risk of gastrointestinal bleeding (GIB). The comparative effect of a combination of anticoagulant (AC) and antiplatelet (AP) versus AC monotherapy on clinical outcomes in patients with AF presenting with GIB is not well characterized. This study compares outcomes in AF patients with GIB on AC alone to those on combination AP and AC therapy, as part of a larger prospective study from 2013 to 2023. 137 patients diagnosed with AF who presented with overt GIB were evaluated during their hospitalization, at one month and one year post-discharge, and then annually. The median follow-up of patients was 57 months. Patients in the combination AP +AC therapy group had a higher prevalence of CAD, myocardial infarction, and coronary/vascular stent placement compared to the AC monotherapy group. No statistically significant differences were noted between the two groups in terms of end-of-follow-up mortality, in-hospital mortality, major bleeding, rebleeding, and length of hospital stay. Cox regression analysis revealed chronic kidney disease (CKD) (hazard ratio (HR) 2.05, 95% confidence interval (CI) [1.04,4.05] (p= 0.038)] and warfarin use [(HR 4.94, 95% CI [1.11,22.09] (p= 0.037)] to be independent predictors of mortality at 12 months. Anti-thrombotic therapy in patients with AF who experience GIB should be mainly directed by their cardiovascular needs. Healthcare providers may explore non-vitamin K antagonist oral anticoagulants as alternatives to warfarin for AF patients at risk of GIB, and efforts must be maximized to prevent bleeding in patients with CKD.