Cardiac resynchronization therapy inpatients with permanent atrial fibrilllation. Is it mandatory to ablate the atrioventricular function to obtain a good response?

Autores: Tolosana, JM; Martín Arnau, Ana María; Madrid, AH; Macías Gallego, Alfonso; Lozano, IF; Osca, J; Quesada, A; Toquero, J; Francés, RM; García Bolao, José Ignacio; Berruezo A, ; Sitges M,; Alcalá MG,; Brugada J,; Mont L.; SPARE II investigators (Spanish Atrial Resynchroni