1) Why is LBBAP considered a physiologic pacing strategy?
It recruits the His–Purkinje system distal to the block or within the left septal conduction network, preserving ventricular synchrony compared with right ventricular apical or septal myocardial pacing.
2) How does LBBAP impact left ventricular ejection fraction (LVEF) in pacing‑induced cardiomyopathy?
By minimizing dyssynchrony, LBBAP often stabilizes or improves LVEF in patients who require high ventricular pacing burden, potentially reducing pacing‑induced cardiomyopathy risk.
3) Is LBBAP an alternative to biventricular CRT in some patients?
For certain conduction disturbances (e.g., some left bundle branch blocks or infra‑Hisian delays), LBBAP can yield CRT‑like resynchronization, though candidacy and comparative outcomes should be individualized.
4) What is the effect on functional capacity and natriuretic peptides?
Improved electrical synchrony can translate into better 6‑minute walk distance and lower NT‑proBNP/BNP in responders; routine monitoring helps assess clinical benefit.
5) Does LBBAP reduce hospitalization for heart failure compared with RV pacing?
Observational data suggest fewer HF hospitalizations versus conventional RV pacing when a high pacing percentage is anticipated; randomized trial data are accumulating and center experience matters.