Direct oral anticoagulants are associated with potentially bleeding lesions in suspected mid-gastrointestinal bleeding. (3rd April 2022) - Macedo Silva, Vítor
Abstract: Background and aim: Direct oral anticoagulants (DOACs) became a widespread alternative in anticoagulant therapy. Nevertheless, concerns are raised about their safety, with increased gastrointestinal bleeding rates being described. There are scarce studies regarding DOACs effect on small-bowel capsule endoscopy (SBCE) findings. We aimed to assess if the detection of lesions with high bleeding potential on SBCE was significantly different in patients treated with DOACs when compared to non-anticoagulated patients and to patients anticoagulated with other agents. Methods: Cohort study including consecutive patients who underwent SBCE for suspected mid-gastrointestinal bleeding (MGIB) in 2019 and 2020. Results: From 148 patients, 38 (25.7%) were anticoagulated, of which 26 (68.4%) with DOACs. P2 lesions were detected in 36.5% ( n = 54) of the patients. These lesions were more frequently detected in patients under DOACs treatment when compared to non-anticoagulated patients (69.2% vs. 29.1%; p =.001), and also when compared to patients treated with other anticoagulants (69.2% vs. 33.3%; p =.037). No differences in P2 lesions detection were observed between patients treated with other anticoagulants and non-anticoagulated patients (33.3% vs. 29.1%; p =.747). In multivariate analysis, DOACs usage was significantly associated with higher detection rates of P2 lesions on SBCE, when adjusted for classical risk factors for MGIB (OR: 3.38; 95%CI = 1.23–9.26; p =.018). Conclusions: Despite their undeniable cardiovascular benefits and easy applicability, DOACs should still be considered with caution. These drugs were significantly associated with higher risk of potentially bleeding lesions on SBCE when compared to other anticoagulants and represent an independent risk factor for MGIB when adjusted for other variables.