PhD Scientific Days 2026

Poster Session 3.R - Cardiovascular Medicine and Research

Kinetics and Disappearance of QRS Transition in Patients Undergoing Left Bundle Branch Pacing - A Novel Method for Classifying Microdislodgement

Előadó neve

Dr. Gémesi, Márk

Neptune code

ZFGPAD

Előadó munkahelye

Észak-Pesti Centrumkórház, Kardiológiai Osztály

Előadó telefonszáma

+36305529666

Előadó e-mail címe

gemesi.mark@gmail.com

Az előadás címe

Kinetics and Disappearance of QRS Transition in Patients Undergoing Left Bundle Branch Pacing - A Novel Method for Classifying Microdislodgement

Szerző(k) neve és munkahelye

Dr. Gémesi Márk¹, Dr. Polgár Balázs², Dr. Gingl Zoltán², Dr. Marczell István Ph.D², Dr. Zsigmond Előd János², Chityil-Papp Letícia², Dr. Bógyi Péter Ph.D², Prof. Dr. Duray Gábor Zoltán¹

1: Észak-Pesti Centrumkórház, Kardiológiai Osztály; Semmelweis Egyetem, Doktori Iskola
2: Észak-Pesti Centrumkórház, Kardiológiai Osztály

Bemutatás módja

Poszter

Szekció

Poster Session 3.R - Cardiovascular Medicine and Research

Language of the presentation

Hungarian

Preferred session

Cardiovascular Medicine and Research

Összefoglaló szövege

Introduction: QRS transition during the threshold test is the gold standard for confirming direct capture of the Conduction System in patients with left bundle branch pacing (LBBP). Still, we have limited data on the kinetics of QRS transition over time. Microdislodgement is a known complication of left bundle branch area pacing (LBBAP); however, its true incidence depends on the thoroughness of follow-up.

Aims: We aimed to evaluate the kinetics and disappearance of QRS transition in patients undergoing LBBP, assess the diagnostic yield of QRS transition at various time points, and characterize microdislodgement.

Method: This prospective study included patients who underwent successful LBBP procedures at a tertiary center between January 2022 and February 2024. Based on the kinetics of QRS transition during intraoperative, postoperative, and follow-up threshold tests, microdislodgement was assessed.

Results: LBB capture was confirmed in 118 of 155 LBBAP patients (76.1%), which defined our LBBP population. Intraoperative QRS transition was observed in 86.4%, which decreased significantly postoperatively (47.0%) and at follow-up (33.0%)-in 92.0% of LBBP patients' capture of LBB remained, while microdislodgement occurred only in 5.0% of LBBP cases.

Conclusion: This study evaluates QRS transition kinetics in LBBAP patients, showing significant intraoperative detectability in patients with direct capture of LBB that decreases postoperatively and at first follow-up. Our classification of microdislodgement aids in understanding its impact on pacing outcomes.

Funding: The authors received no specific funding for this work.

University

Semmelweis University

Supervisor

Prof. Dr. Duray Gábor Zoltán

Publication of my abstract

I give consent to the publication of my abstract on the website of the congress.

phd.section.field

in doctoral studies before complex exam (PhD)

Kind

Szabad

Status

elfogadva

Accepted presentation method

poszter

Előadás fájl jóváhagyás

nem rendelkezett róla

Előadó

9833

Start

14:12

End

14:15