Figure 3: LBBAP using stylet-driven and lumen-less pacing leads
Fluoroscopic localization, twelve-lead electrocardiogram and
intracardiac recordings from LBBAP lead are shown. Upper panel:
Representative example of left bundle branch area pacing (LBBAP) using a
stylet-driven lead (Solia S). Unipolar pacing yielded a narrow paced QRS
morphology with typical Qr pattern in lead V1, short paced QRS duration
(pQRSD) of 105ms and short interval form stimulus to peak left
ventricular activation time (LVAT) of 72ms. Note the presence of left
bundle branch potential (LBBp) on the intracardiac (IC) electrograms.
Lower panel: Representative example of LBBAP using a lumen-less lead
with fixed helix (SelectSecure 3830 lead, Medtronic). LBBAP at this
position resulted in a narrow (84ms) paced QRS morphology with short
stimulus to LVAT (51ms) and typical Qr pattern in lead V1. At this site
a LBBp was noted.