Fig. 2From: Physiological pacing to improve cardiac resynchronization therapy non-responder and a tryst with calcified septum—a case reporta Post-CRT paced ECG showed positive V1 and negative lead I with QRS duration of 160 ms. b Post-HBP with LV delay of 40 ms and AV delay of 80 ms, narrow (106 ms) complex QRS was achievedBack to article page