P913Optimization of cardiac resynchronization therapy device selection guided by cardiac magnetic resonance imaging is cost-effective. (19th March 2018) - Linhart, M; Crespo, C; Acosta, J; Martinez, M; Mira, A; Restovic, G; Sagarra, J; Fahn, B; Boltyenkov, A; Lasalvia, L; Sampietro Colom, L; Berruezo, A