Left bundle branch area pacing versus biventricular pacing for cardiac resynchronisation therapy

Abstract Funding Acknowledgements Type of funding sources: None. Background Conventional right ventricular pacing induces dyssynchrony and 20% patients may need upgrade for resynchronisation therapy (CRT). Currently, left bundle branch area (LBBAP) is growing as an alternative conventional pacing, preserving function. Purpose We aimed to describe procedural characteristics a group consecutive submitted LBBAP, compare the final QRS duration idiopathic LBB CRT. Methods Single-centre cohort including LBBAP or CRT since November 2021. Feasibility, procedure fluoroscopy times, during immediately after implantation, periprocedural complications were assessed. Successful implantation LBBA was defined activation time (LVAT) < 90ms plus block pattern in V1. Results A total 91 (mean age 75±11 years, 70.3% male, 43 [47.3%] with LBBAP) included. Total (63min [50-76] vs. 91min [71-131], p<0.001) times (4.1min [2.4-6.4] 13.4min [8.3-23.1], significantly lower group, respectively. In median LVAT 86ms (IQR 81-94) no cases electrode dislocation perforation at discharge reported. Final 112ms 105-125) vs 127ms 115-143) groups respectively (p<0.001). Conclusion When compared CRT, faster, required less associated narrower QRS. Further studies are necessary understand its role LV dysfunction indication therapy.