• Blanca Coll-Vinent, Alfonso Martín, Juan Sánchez, Juan Tamargo, Coral Suero, Francisco Malagón, Mercedes Varona, Manuel Cancio, Susana Sánchez, José Carbajosa, José Ríos, Georgina Casanovas, Carles Ràfols, Carmen Del Arco, and EMERG-AF Investigators.
• From the Arrhythmia Division, Spanish Society of Emergency Medicine (SEMES), Madrid, Spain (B.C.-V., A.M., J.S., C.S., F.M., M.V., M.C., S.S., J.C., C.d.A.); Atrial Fibrillation Unit (UFA) (B.C.-V.), and Department of Pharmacology, CIBERCV, Universidad Complutense, Madrid, Spain (J.T.); Laboratory of Biostatistics and Epidemiology, Universitat Autònoma de Barcelona; Medical Statistics Core Facility, IDIBAPS (Hospital Clinic), Barcelona, Spain (J.R., G.C.); and Medical Department, Bayer Hispania-sl, Barcelona, Spain (C.R.). bcvinent@clinic.cat.
• Stroke. 2017 May 1; 48 (5): 1344-1352.

Background And PurposeLong-term benefits of initiating stroke prophylaxis in the emergency department (ED) are unknown. We analyzed the long-term safety and benefits of ED prescription of anticoagulation in atrial fibrillation patients.MethodsProspective, multicenter, observational cohort of consecutive atrial fibrillation patients was performed in 62 Spanish EDs. Clinical variables and thromboprophylaxis prescribed at discharge were collected at inclusion. Follow-up at 1 year post-discharge included data about thromboprophylaxis and its complications, major bleeding, and death; risk was assessed with univariate and bivariate logistic regression models.ResultsWe enrolled 1162 patients, 1024 (88.1%) at high risk according to CHA2DS2-VASc score. At ED discharge, 935 patients (80.5%) were receiving anticoagulant therapy, de novo in 237 patients (55.2% of 429 not previously treated). At 1 year, 48 (4.1%) patients presented major bleeding events, and 151 (12.9%) had died. Anticoagulation first prescribed in the ED was not related to major bleeding (hazard ratio, 0.976; 95% confidence interval, 0.294-3.236) and was associated with a decrease in mortality (hazard ratio, 0.398; 95% confidence interval, 0.231-0.686). Adjusting by the main clinical and sociodemographic characteristics, concomitant antiplatelet treatment, or destination (discharge or admission) did not affect the results.ConclusionsPrescription of anticoagulation in the ED does not increase bleeding risk in atrial fibrillation patients at high risk of stroke and contributes to decreased mortality.© 2017 The Authors.

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