Incidence and clinical relevance of uncontrolled ventricular rate during atrial fibrillation in heart failure patients treated with cardiac resynchronization therapy. - Boriani, Giuseppe; Gasparini, Maurizio; Landolina, Maurizio; Lunati, Maurizio; Proclemer, Alessandro; Lonardi, Gabriele; Iacopino, Saverio; Rahue, Werner; Biffi, Mauro; DiStefano, Paola; Grammatico, Andrea; Santini, Massimo (European Journal of Heart Failure, 2011)