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Thoracoscopic Versus Catheter Ablation in Persistent Atrial Fibrillation With Enlarged Left Atrium

19 agosto 2026 aggiornato da: Young Keun On, Samsung Medical Center

Endocardial Catheter Ablation Versus Thoracoscopic Ablation in De Novo Persistent Atrial Fibrillation Patients With Enlarged Left Atrium: A Randomized Controlled Trial

This is a prospective, single-center, open-label, randomized controlled trial comparing thoracoscopic surgical ablation with percutaneous endocardial catheter ablation as the first rhythm-control procedure in patients with persistent atrial fibrillation and an enlarged left atrium (LA diameter ≥50 mm or LA volume index ≥45 mL/m²).

A total of 194 patients who have never undergone an ablation procedure for atrial fibrillation will be randomly assigned 1:1 to thoracoscopic ablation or percutaneous catheter ablation, stratified by duration of atrial fibrillation. The primary endpoint is recurrence of atrial tachyarrhythmia (atrial fibrillation, atrial flutter, or atrial tachycardia) after a 3-month blanking period. The investigators hypothesize that thoracoscopic ablation will significantly reduce recurrence compared with catheter ablation in this population.

A secondary hypothesis is that 14-day patch monitoring detects recurrent atrial tachyarrhythmia more sensitively than conventional 24-hour Holter monitoring.

Panoramica dello studio

Stato

Reclutamento

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Pulmonary vein isolation is an established rhythm-control therapy for symptomatic atrial fibrillation refractory to antiarrhythmic drugs. Its efficacy is lower in persistent than in paroxysmal atrial fibrillation, and additional substrate modification of the left atrium is frequently required.

Percutaneous catheter ablation (radiofrequency, cryoballoon or PFA) and thoracoscopic surgical ablation are both used in current practice. Thoracoscopic ablation additionally allows epicardial pulmonary vein isolation, ganglionated plexi ablation, dissection of the ligament of Marshall, and left atrial appendage exclusion, at the cost of a longer hospital stay and a higher incidence of post-procedural pericarditis. Recent trials have shown broadly comparable efficacy and safety between the two approaches, so both are used interchangeably in practice.

In a retrospective analysis of the institutional ablation registry at the study site, overall outcomes of the two strategies were comparable, but among patients with an enlarged left atrium thoracoscopic ablation was associated with significantly lower recurrence of atrial tachyarrhythmia. Because that finding came from a subgroup of a retrospective cohort, it could not support a firm conclusion.

This trial therefore prospectively tests, in patients with persistent atrial fibrillation and an enlarged left atrium undergoing a first rhythm-control procedure, whether thoracoscopic ablation is superior to percutaneous catheter ablation.

Post-procedural management is identical in both arms: a 3-month blanking period, discontinuation of antiarrhythmic drugs at 3 months (up to 6 months) if sinus rhythm is maintained, and anticoagulation for at least 3 months with subsequent decisions based on recurrence, prior stroke, and CHA2DS2-VASc score. Follow-up visits occur at 3, 6, and 12 months and every 6 months thereafter until 1 year after the last patient is enrolled. Rhythm monitoring uses 12-lead ECG, 24-hour Holter (3, 6, 12 months), and 14-day patch monitoring; echocardiography and NT-proBNP are obtained at baseline, 12 months, and annually thereafter.

Tipo di studio

Interventistico

Iscrizione (Stimato)

194

Fase

  • Non applicabile

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

  • Nome: Young Keun On, MD, PhD
  • Numero di telefono: +82-2-3410-2578
  • Email: yk.on@samsung.com

Luoghi di studio

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Adulto
  • Adulto più anziano

Accetta volontari sani

No

Descrizione

Inclusion Criteria:

  • Age 19 years or older
  • Persistent atrial fibrillation refractory to antiarrhythmic drug therapy, or in whom antiarrhythmic drug therapy cannot be maintained
  • European Heart Rhythm Association (EHRA) symptom score ≥ 2
  • Considered suitable for rhythm-control therapy by either percutaneous catheter ablation or thoracoscopic ablation, at the investigator's medical discretion
  • Enlarged left atrium, defined as left atrial diameter ≥ 50 mm or left atrial volume index ≥ 45 mL/m²

Exclusion Criteria:

  • Previous percutaneous catheter ablation or thoracoscopic ablation for atrial fibrillation
  • Previous thoracic or cardiac surgery
  • Absolute contraindication to anticoagulation therapy
  • Life expectancy less than 1 year due to non-cardiac disease, or anticipated poor adherence to treatment, at the investigator's medical discretion
  • Refusal to participate in the study

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: Thoracoscopic ablation
Thoracoscopic surgical ablation is performed according to the standard technique. Pulmonary vein isolation and left atrial appendage exclusion are mandatory. Additional lesions are at the operator's discretion.
Thoracoscopic surgical ablation is performed according to the standard technique. Pulmonary vein isolation and left atrial appendage exclusion are mandatory. Additional lesions are at the operator's discretion.
Comparatore attivo: Percutaneous catheter ablation
Percutaneous endocardial catheter ablation is performed using radiofrequency, cryoballoon, or pulsed field energy. Pulmonary vein isolation is mandatory. Additional lesions are at the operator's discretion.
Percutaneous endocardial catheter ablation is performed using radiofrequency, cryoballoon, or pulsed field energy. Pulmonary vein isolation is mandatory. Additional lesions are at the operator's discretion.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Recurrence of atrial tachyarrhythmia
Lasso di tempo: From 3 months after the index procedure until 1 year after enrollment of the last patient
Recurrence of atrial fibrillation, atrial flutter, or atrial tachycardia, defined as an episode documented on 12-lead ECG or sustained for at least 30 seconds on continuous monitoring (14-day patch monitor or 24-hour Holter). Recurrences during the 3-month blanking period are not counted as events.
From 3 months after the index procedure until 1 year after enrollment of the last patient

Misure di risultato secondarie

Misura del risultato
Lasso di tempo
Recurrence of atrial fibrillation
Lasso di tempo: From 3 months after the index procedure until 1 year after enrollment of the last patient
From 3 months after the index procedure until 1 year after enrollment of the last patient
Recurrence of atrial flutter
Lasso di tempo: From 3 months after the index procedure until 1 year after enrollment of the last patient
From 3 months after the index procedure until 1 year after enrollment of the last patient
Recurrence of atrial tachycardia
Lasso di tempo: From 3 months after the index procedure until 1 year after enrollment of the last patient
From 3 months after the index procedure until 1 year after enrollment of the last patient
All-cause death
Lasso di tempo: From 3 months after the index procedure until 1 year after enrollment of the last patient
From 3 months after the index procedure until 1 year after enrollment of the last patient
Cardiac death
Lasso di tempo: From 3 months after the index procedure until 1 year after enrollment of the last patient
From 3 months after the index procedure until 1 year after enrollment of the last patient
Stroke
Lasso di tempo: From 3 months after the index procedure until 1 year after enrollment of the last patient
From 3 months after the index procedure until 1 year after enrollment of the last patient
Hospitalization for heart failure
Lasso di tempo: From 3 months after the index procedure until 1 year after enrollment of the last patient
From 3 months after the index procedure until 1 year after enrollment of the last patient
Procedure-related complications
Lasso di tempo: From 3 months after the index procedure until 1 year after enrollment of the last patient
From 3 months after the index procedure until 1 year after enrollment of the last patient

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

1 maggio 2024

Completamento primario (Stimato)

1 maggio 2028

Completamento dello studio (Stimato)

1 maggio 2029

Date di iscrizione allo studio

Primo inviato

19 agosto 2026

Primo inviato che soddisfa i criteri di controllo qualità

19 agosto 2026

Primo Inserito (Effettivo)

25 agosto 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

25 agosto 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

19 agosto 2026

Ultimo verificato

1 agosto 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • SMC 2023-06-103
  • KCT0009360 (Altro identificatore: Korea National Institute of Health)

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .