PO-03-018 PERFORMANCE AND ECHOCARDIOGRAPHIC OUTCOMES OF LEFT POSTERIOR FASCICULAR CAPTURE DURING CONDUCTION SYSTEM PACING: A SINGLE CENTER EXPERIENCE

Left bundle branch area pacing (LBBAP) has been shown to have acceptable acute procedural outcomes and stable lead trends over time. There are limited data regarding of implantation distally capture the left posterior fascicle (LPF). To evaluate safety feasibility achieving LBBAP through LPF. Patients referred for pacemaker between 2/1/19-7/31/22 were considered LBBAP. success was guided by conventional parameters. with ventricular activation time (LVAT) ≤ 85ms included analysis. Paced QRS morphology analyzed RBBB pattern in V1, as well axis deviation indicative LPF capture. Implant rates, complications, electrophysiologic echocardiographic parameters assessed patients without (LBBAP). 440 characteristics noted 159 (36.1%) patients. Baseline demographics, ECG, similar groups. QRSd group 117.43 ± 11.06 vs. 114.25 13.02 (p=0.01) group. Mean LVAT 71.23 8.32 71.85 8.31 (p>0.05) group, respectively. Pacing thresholds, impedance sensed R waves at follow-up period. pre-procedural post-procedural LVEF cohort 53.83 11.87 55.52 7.86 (p>0.05), compared 56.37 9.66 56.29 8.37 1 patient underwent revision. during is safe, feasible, a reliable alternative achieve physiologic pacing.