43Hisian pacing with apical back-up on demand is safe and effective. (19th March 2018) - Zanon, F; Marcantoni, L; Pastore, G; Baracca, E; Picariello, C; Lanza, D; Giatti, S; Aggio, S; Carraro, M; Conte, L; D'elia, K; Roncon, L; et al.