Cited by 86Cardiac Arrhythmias and TreatmentsCardiac electrophysiology and arrhythmiasAtrial Fibrillation Management and Outcomes

Electrophysiological effects of ibutilide in patients with accessory pathways

Glatter, Kathryn A., Dorostkar, Parvin C., Yang, Yanfei, Lee, Randall J., Van Hare, George F., Keung, Edmund, Modin, Gunnard, Scheinman, Melvin M.·2001·Circulation

Abstract

BACKGROUND: Atrial fibrillation (AF) may cause life-threatening ventricular arrhythmias in patients with Wolff-Parkinson-White syndrome. We prospectively evaluated the effects of ibutilide on the conduction system in patients with accessory pathways (AP). METHODS AND RESULTS: In part I, we gave ibutilide to 22 patients (18 men, 31+/-13 years of age) who had AF during electrophysiology study, including 6 pediatric patients </=18 years of age. Ibutilide terminated AF in 21 of 22 patients (95%) during or 8+/-5 minutes after infusion and prolonged the shortest preexcited R-R interval during AF. Successful ablation was performed in all patients. In part II, ibutilide was given to 18 patients (14 men, 28+/-21 years) to assess its effects on the AP and conduction system. Ibutilide prolonged the antegrade atrioventricular node effective refractory period (ERP) (from 252+/-60 to 303+/-70 ms; P<0.02). Ibutilide caused transient loss of the delta wave in 1 patient and abolished inducible tachycardia in 2 patients, although retrograde mapping still allowed for successful AP ablation. The antegrade AP ERP prolonged from 275+/-40 to 320+/-60 ms (P<0.01), as did the antegrade AP block cycle length; the retrograde AP ERP and block cycle length similarly prolonged with ibutilide. The relative and effective refractory period of the His-Purkinje system increased in 61% of patients after ibutilide. There were no adverse side effects. CONCLUSIONS: We report the use of ibutilide in terminating AP-mediated AF, including the first report in the pediatric population. Ibutilide prolonged refractoriness of the atrioventricular node, His-Purkinje system, and AP.

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Crossref · 10.1161/hc4101.097538

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Authors
Glatter, K. A., Dorostkar, P. C., Yang, Y., Lee, R. J., Van Hare, G. F., Keung, E., Modin, G., & Scheinman, M. M.
Affiliations
  • San Francisco VA Medical Center (US)
  • From the Cardiovascular Research Institute and Section of Adult and Pediatric Cardiac Electrophysiology, University of California, San Francisco; and San Francisco Veterans Administration Medical Center (E.K.).
Venue
Circulation
Published
2001-10-16
Volume
104
Issue
16
Pages
1933-1939
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W1995037447
Cited by
86
References
18
Citations by year
2026: 3 · 2025: 6 · 2024: 1 · 2023: 4 · 2022: 3 · 2021: 5 · 2020: 3 · 2019: 4 · 2018: 1 · 2017: 2 · 2016: 2 · 2015: 8 · 2014: 2 · 2013: 3 · 2012: 2
FWCI
2.68
Type
journal article
Language
en
Open access
closed
Locations
  • Circulation (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Arrhythmias and Treatments
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Atrial Fibrillation Management and Outcomes
Keywords
ibutilide, accessory pathway, Wolff-Parkinson-White syndrome, atrial fibrillation, atrioventricular node refractory period, accessory pathway refractory period, delta oscillations, pediatric patients, catheter ablation, ventricular arrhythmias
MeSH terms
Adolescent, Adult, Anti-Arrhythmia Agents, Atrial Fibrillation, Cardiac Pacing, Artificial, Child, Child, Preschool, Electrocardiography, Female, Cardiac Catheterization, Heart Conduction System, Humans, Infusions, Intravenous, Male, Middle Aged, Prospective Studies, Sulfonamides, Wolff-Parkinson-White Syndrome, Treatment Outcome, Electrophysiologic Techniques, Cardiac

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