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09-05-2024 | Cardiac Resynchronization Therapy | Research

Adverse Effect of Bundle Branch Block on Exercise Performance in Patients with Fontan Physiology: From the Pediatric Heart Network Fontan Public Data Set

Authors: Omar Meziab, Emily Dereszkiewicz, Claudia E. Guerrero, Andrew W. Hoyer, Brent J. Barber, Scott E. Klewer, Michael D. Seckeler

Published in: Pediatric Cardiology | Issue 4/2025

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Abstract

Patients with Fontan physiology have reduced exercise performance compared to their peers as well as a higher incidence of bundle branch block (BBB). This study aims to investigate the association between BBB and exercise performance in the Fontan population through a retrospective review of the Pediatric Heart Network Fontan study public use dataset. “Low Performers” were defined as ≤ 25th percentile (for Fontan patients) for each exercise parameter at anaerobic threshold (AT) for gender and age and “Normal Performers” were all other patients. A total of 303 patients with Fontan physiology who underwent exercise testing reached AT and had complete data for BBB. BBB occurred more frequently in Low Performers for VO2 [OR (95% CI): 2.6 (1.4, 4.8)] and Work [OR (95% CI): 2.7 (1.4, 5.1)], suggesting that BBB in the Fontan population is associated with reduced exercise performance. This data adds to the existing clinical evidence of the adverse effects of conduction abnormalities on single ventricle cardiac output and adds support for consideration of cardiac resynchronization and multi-site ventricular pacing in this patient population.
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Metadata
Title
Adverse Effect of Bundle Branch Block on Exercise Performance in Patients with Fontan Physiology: From the Pediatric Heart Network Fontan Public Data Set
Authors
Omar Meziab
Emily Dereszkiewicz
Claudia E. Guerrero
Andrew W. Hoyer
Brent J. Barber
Scott E. Klewer
Michael D. Seckeler
Publication date
09-05-2024
Publisher
Springer US
Published in
Pediatric Cardiology / Issue 4/2025
Print ISSN: 0172-0643
Electronic ISSN: 1432-1971
DOI
https://doi.org/10.1007/s00246-024-03500-1

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