Septal flash predicts cardiac resynchronization therapy response in patients with permanent atrial fibrillation. - Gabrielli L; Marincheva G; Bijnens B; Doltra A; Tolosana JM; Borràs R; Castel MA; Berruezo A; Brugada J; Mont L; Sitges M (Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology, 2014)