P1012Automatic SonR optimization is associated with improved outcomes in CRT subgroups at high risk of non-response. (20th June 2017) - Singh, J.; Aydin, A.; Murgatroyd, F.; Padeletti, L.; Martinez, JG.; Kaye, G.; Mansourati, J.; Leyva, F.; Brachmann, J.; Brugada, J.