P1011Weekly SonR optimization is associated with significantly reduced risk in all-cause death and/or heart failure hospitalization in CRT-D patients with LBBB QRS<150ms. (20th June 2017) - Brachmann, J.; Brugada, J.; Singh, J.; Nayak, H.; Moccetti, T.; Aziz, E.; Babuty, D.; Hobson, N.; Martino, M.; Delnoy, PP.