Discussion
This UHF-ECG study describes in detail the time delays between the
activation of ventricular segments during RV pacing and shows: (1)
pacing of the basal interventricular septum with conductive system
engagement produces the smallest ventricular dyssynchrony compared to
other myocardial captures of the right ventricle and (2) pacing of RV
septal inflow area results in less LV ventricular dyssynchrony than
septal RVOT pacing, although no differences in QRSd were observed
between them.