Evidence map›Paper›PMID 33421265›Full record

Trial reportJournal of cardiovascular electrophysiology2021

Targeting the ectopy-triggering ganglionated plexuses without pulmonary vein isolation prevents atrial fibrillation.

Belinda Sandler, Min-Young Kim, Markus B Sikkel, Louisa Malcolme-Lawes, Michael Koa-Wing, Zachary I Whinnett, Clare Coyle, Nick W F Linton, Phang B Lim, Prapa Kanagaratnam and 1 more

Open access · hybridAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Journal of cardiovascular electrophysiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 4 pooled it
2.2field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed, 4 syntheses or guidelines pooled it, 19 citations in OpenAlex.

  1. Pooled it
  2. Pulmonary vein isolation plus adjunctive therapy for the treatment of atrial fibrillation: a systematic review and meta-analysis.Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing · 2024
    Pooled it
  3. Guideline
  4. Guideline
  5. Trial
  6. Trial
  7. Review
  8. Pulmonary vein isolation versus focused ganglionic plexus ablation: a meta-analysis of randomized controlled trials.Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing · 2025
    Article
  9. Feasibility of mapping and ablating ectopy-triggering ganglionated plexus reproducibly in persistent atrial fibrillation.Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing · 2025
    Article
  10. A comparative meta-analysis of addition of ganglionic plexus ablation versus no ganglionic plexus ablation to pulmonary vein isolation for atrial fibrillation.Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing · 2025
    Article
  11. Article
  12. Article
  13. Review
  14. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors at 2 institutions in 2 countries.

Belinda SandlerMyocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK.
Min-Young KimMyocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK.ORCID 0000-0001-6441-1798
Markus B SikkelMyocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK.
Louisa Malcolme-LawesImperial Centre for Cardiac Engineering, Imperial College London, London, UK.
Michael Koa-WingImperial Centre for Cardiac Engineering, Imperial College London, London, UK.
Zachary I WhinnettImperial Centre for Cardiac Engineering, Imperial College London, London, UK.
Clare CoyleMyocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK.
Nick W F LintonMyocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK.ORCID 0000-0002-5712-849X
Phang B LimMyocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK.
Prapa KanagaratnamMyocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK.ORCID 0000-0003-3593-2185
other members of the Imperial College London, Cardiovascular Study Group/Consortium
Imperial College Healthcare NHS Trust · GBLung Institute · US

Funding

British Heart Foundation FS/13/73/30352British Heart Foundation FS/15/25/31423Department of Health
6 · The paper itself

Abstract

backgroundGanglionated plexuses (GPs) are implicated in atrial fibrillation (AF). Endocardial high-frequency stimulation (HFS) delivered within the local atrial refractory period can trigger ectopy and AF from specific GP sites (ET-GP). The aim of this study was to understand the role of ET-GP ablation in the treatment of AF.

methodsPatients with paroxysmal AF indicated for ablation were recruited. HFS mapping was performed globally around the left atrium to identify ET-GP. ET-GP was defined as atrial ectopy or atrial arrhythmia triggered by HFS. All ET-GP were ablated, and PVs were left electrically connected. Outcomes were compared with a control group receiving pulmonary vein isolation (PVI). Patients were followed-up for 12 months with multiple 48-h Holter ECGs. Primary endpoint was ≥30 s AF/atrial tachycardia in ECGs.

resultsIn total, 67 patients were recruited and randomized to ET-GP ablation (n = 39) or PVI (n = 28). In the ET-GP ablation group, 103 ± 28 HFS sites were tested per patient, identifying 21 ± 10 (20%) GPs. ET-GP ablation used 23.3 ± 4.1 kWs total radiofrequency (RF) energy per patient, compared with 55.7 ± 22.7 kWs in PVI (p = <.0001). Duration of procedure was 3.7 ± 1.0 and 3.3 ± 0.7 h in ET-GP ablation group and PVI, respectively (p = .07). Follow-up at 12 months showed that 61% and 49% were free from ≥30 s of AF/AT with PVI and ET-GP ablation respectively (log-rank p = .27).

conclusionsIt is feasible to perform detailed global functional mapping with HFS and ablate ET-GP to prevent AF. This provides direct evidence that ET-GPs are part of the AF mechanism. The lower RF requirement implies that ET-GP targets the AF pathway more specifically.

Indexed as

Atrial FibrillationCatheter AblationPulmonary VeinsElectrocardiography, AmbulatoryHeart AtriaHumansRecurrenceTreatment Outcomeatrial fibrillationautonomic nervous systemcatheter ablationganglionated plexuspulmonary vein ectopy

Identifiers

PMID33421265
PMCPMC8611799
OpenAlexW3119353096

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.