QRS duration (A) and changes in QTc (B), JTc (C), and Tpeak-Tend,c (D) compared to baseline following BiVP and LBBAP. BiVP, biventricular pacing; LBBAP, left bundle branch area pacing; ms, milliseconds. *Significant difference between groups. †Significantly different from baseline. #Significantly different from the acute phase. α ≤ 0.05.