P6284Effectiveness and safety of direct anticoagulants versus vitamin K antagonists in octogenarians patients with atrial fibrillation in a "real world" nationwide registry. (28th August 2018) - Ruiz Ortiz, M; Esteve-Pastor, M A; Rana Miguez, P; Marin, F; Martinez-Selles, M; Roldan, I; Muniz, J; Cequier, A; Bertomeu, V; Anguita, M; ,