Belhassen, Bernard; Conte, Giulio; Steinberg, Christian; Whitaker, John; Khan, Habib R; Laredo, Mikael; Doldi, Florian; Ho, Reginald; Tadros, Rafik; Dinov, Boris; Chorin, Ehud; Hansom, Simon; Waintraub, Xavier; Eckardt, Lars; Jankelson, Lior; Peichl, Petr; Mellor, Greg; Sy, Raymond W; Rattanawong, Pattara; Stojkovic, Stefan; ... (2024). Mode and Characteristics of Arrhythmia Initiation in Idiopathic Ventricular Fibrillation: A THESIS Substudy. (In Press). JACC Clinical electrophysiology Elsevier 10.1016/j.jacep.2024.03.036
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BACKGROUND
There is limited information on the mode of arrhythmia initiation in idiopathic ventricular fibrillation (IVF). A non-pause-dependent mechanism has been suggested to be the rule.
OBJECTIVES
The aim of this study was to assess the mode and characteristics of initiation of polymorphic ventricular tachycardia (PVT) in patients with short or long-coupled PVT/IVF included in THESIS (THerapy Efficacy in Short or long-coupled idiopathic ventricular fibrillation: an International Survey), a multicenter study involving 287 IVF patients treated with drugs or radiofrequency ablation.
METHODS
We reviewed the initiation of 410 episodes of ≥1 PVT triplet in 180 patients (58.3% females; age 39.6 ± 13.6 years) with IVF. The incidence of pause-dependency arrhythmia initiation (prolongation by >20 ms of the preceding cycle length) was assessed.
RESULTS
Most arrhythmias (n = 295; 72%) occurred during baseline supraventricular rhythm without ambient premature ventricular complexes (PVCs), whereas 106 (25.9%) occurred during baseline rhythm including PVCs. Nine (2.2%) arrhythmias occurred during atrial/ventricular pacing and were excluded from further analysis. Mode of PVT initiation was pause-dependent in 45 (15.6%) and 64 (60.4%) of instances in the first and second settings, respectively, for a total of 109 of 401 (27.2%). More than one type of pause-dependent and/or non-pause-dependent initiation (mean: 2.6) occurred in 94.4% of patients with ≥4 events. Coupling intervals of initiating PVCs were <350 ms, 350-500 ms, and >500 ms in 76.6%, 20.72%, and 2.7% of arrhythmia initiations, respectively.
CONCLUSIONS
Pause-dependent initiation occurred in more than a quarter of arrhythmic episodes in IVF patients. PVCs having long (between 350 and 500 ms) and very long (>500 ms) coupling intervals were observed at the initiation of nearly a quarter of PVT episodes.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
04 Faculty of Medicine > Department of Cardiovascular Disorders (DHGE) > Clinic of Cardiology |
UniBE Contributor: |
Reichlin, Tobias Roman |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
2405-5018 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
11 Jun 2024 13:02 |
Last Modified: |
11 Jun 2024 13:11 |
Publisher DOI: |
10.1016/j.jacep.2024.03.036 |
PubMed ID: |
38842971 |
Additional Information: |
THESIS Investigators: Babken Asatryan is one of the collaborators. |
Uncontrolled Keywords: |
idiopathic ventricular fibrillation long-coupled ventricular arrhythmias pause-dependency polymorphic ventricular tachycardia short-coupled ventricular arrhythmias |
BORIS DOI: |
10.48350/197651 |
URI: |
https://boris.unibe.ch/id/eprint/197651 |
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