NPPB and hydrops fetalis: The main findings of this study are as follows: In HF patients unable to achieve LBB capture during LBBAP-CRT, (i) LVSP combined with LVP achieves better acute electrical resynchronization and hemodynamic response than LVSP alone; (ii) LVSP + LVP had greater improvement in LVEF and more significant reduction in NT-proBNP levels; (iii) compared with LVSP, LVSP + LVP was associated with a lower incidence of composite clinical endpoints, particularly significantly lower rate of HFH during long-term follow-up.