Azaña Gómez, JavierPérez-Belmonte, Luis MRubio-Rivas, ManuelBascuñana, JoséQuirós-López, RaúlTaboada Martínez, María LuisaMontero Hernandez, EstherRoque-Rojas, FernandoMéndez-Bailón, ManuelGómez-Huelgas, Ricardoen nombre del grupo SEMI-COVID-192023-05-032023-05-032022-03-10http://hdl.handle.net/10668/22371Atrial fibrillation and associated comorbidities pose a risk factor for mortality, morbidity and development of complications in patients admitted for COVID-19. To describe the clinical, epidemiological, radiological and analytical characteristics of patients with atrial fibrillation admitted for COVID-19 in Spain. Secondarily, we aim to identify those variables associated with mortality and poor prognosis of COVID-19 in patients with atrial fibrillation. Retrospective, observational, multicenter, nationwide, retrospective study of patients hospitalized for COVID-19 from March 1 to October 1, 2020. Data were obtained from the SEMI-COVID-19 Registry of the Spanish Society of Internal Medicine (SEMI) in which 150 Spanish hospitals participate. Between March 1 and October 1, 2020, data from a total of 16,461 patients were entered into the SEMI-COVID-19 registry. 1816 (11%) had a history of atrial fibrillation and the number of deaths among AF patients amounted to 738 (41%). Regarding clinical characteristics, deceased patients were admitted with a higher heart rate (88.38 vs. 84.95; P>0.01), with a higher percentage of respiratory failure (67.2 vs. 20.1%; P0.01), with a higher percentage of respiratory failure (67.2 vs. 20.1%; P Previous treatment with DOACs and DOACs treatment during admission seem to have a protective role in patients with atrial fibrillation, although this fact should be verified in prospective studies.enAnticoagulaciónAnticoagulationAtrial fibrillationCOVID-19Factor de riesgoFibrilación auricularHospitalizaciónHospitalizationMortalidadMortalityRisk factorHumansAtrial FibrillationCOVID-19Retrospective StudiesProspective StudiesSARS-CoV-2RegistriesRisk Factorsresearch article35282900open access10.1016/j.medcli.2022.01.0081578-8989PMC8908017https://doi.org/10.1016/j.medcli.2022.01.008https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8908017/pdf