SSSy – sick sinus syndrome, AV – atrioventricular, LBBB – left bundle branch block, RBBB – right bundle branch block, BBB – bundle branch block, UHF-ECG – ultra-high frequency ECG, * HV – His to ventricle (RBB potential-ventricle intervals in patients with HV < 35 ms are included), RWPT – R wave peak time, cSp – conductive system septal pacing
Table 2: Mixed effect model values for LVLWd, RVLWd, V5-8d, during cSp, RVIT, RVOT captures and spontaneous rhythms without bundle branch blocks (for detailed statistics see appendix B).