Deze pagina is automatisch vertaald en de nauwkeurigheid van de vertaling kan niet worden gegarandeerd. Raadpleeg de Engelse versie voor een brontekst.

Unipolar Voltage-Guided Substrate Modification Plus Pulsed Field Ablation Pulmonary Vein Isolation Versus Pulmonary Vein Isolation Alone in Persistent Atrial Fibrillation (UNI-PFA)

3 november 2026 bijgewerkt door: China National Center for Cardiovascular Diseases

Unipolar Voltage-Guided Individualized Substrate Modification Combined With Pulsed Field Ablation-Based Pulmonary Vein Isolation Versus Pulmonary Vein Isolation Alone in Persistent Atrial Fibrillation: A Multicenter, Randomized, Open-Label, Superiority Trial

UNI-PFA is a multicenter, randomized, open-label, superiority trial evaluating whether adding unipolar voltage-guided individualized substrate modification to pulsed field ablation (PFA)-based pulmonary vein isolation (PVI) improves outcomes in patients with persistent atrial fibrillation and a left atrial low-voltage area (LVA) burden of at least 10% of the post-PVI left atrial surface area. Participants are randomized 1:1 to PFA-PVI plus individualized substrate modification (homogenization, box isolation, linear ablation, or a combination) or PFA-PVI alone. The primary endpoint is treatment success at 12 months, defined as freedom from documented atrial fibrillation, atrial tachycardia, or atrial flutter lasting more than 30 seconds after a 90-day blanking period while off class I/III antiarrhythmic drugs. Follow-up includes 14-day continuous ECG patch monitoring at 3, 6, and 12 months, symptom-triggered single-lead ECG, and quality-of-life assessments.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Background: Pulmonary vein isolation (PVI) is the cornerstone of catheter ablation for atrial fibrillation, but outcomes in persistent atrial fibrillation remain suboptimal, with approximately 50% freedom from recurrence in unselected patients. Left atrial low-voltage areas (LVAs) are an electrical surrogate for atrial fibrosis and predict recurrence after PVI. Unipolar voltage mapping may detect intramural or epicardial fibrosis that bipolar mapping misses. Pulsed field ablation (PFA) provides preferential myocardial ablation with a favorable safety profile. Whether adding unipolar voltage-guided individualized substrate modification to PFA-PVI improves outcomes in patients with a substantial LVA burden is unknown.

Design: UNI-PFA is a multicenter, randomized, open-label, superiority trial. Approximately 294 participants with persistent or long-standing persistent atrial fibrillation and a unipolar LVA burden of at least 10% of the post-PVI left atrial surface area (excluding the pulmonary vein antra, left atrial appendage, and fossa ovalis) will be randomized 1:1. Randomization is stratified by sex and LVA proportion category (10-20%, 20-30%, and >30%). The experimental arm receives PFA-PVI plus individualized substrate modification selected according to LVA location (homogenization, box isolation, linear ablation, or a combination); the active comparator arm receives PFA-PVI alone. All participants receive 14-day continuous ECG patch monitoring at 3, 6, and 12 months, symptom-triggered single-lead ECG, and unscheduled ECG/Holter/telemetry when clinically indicated.

Endpoints: The primary endpoint is treatment success at 12 months, defined as freedom from documented atrial fibrillation, atrial tachycardia, or atrial flutter lasting more than 30 seconds after a 90-day blanking period while off class I/III antiarrhythmic drugs, allowing up to one repeat ablation within 6 months of the index procedure. Patients who remain on class I/III antiarrhythmic drugs at 12 months are counted as treatment failures. Twelve prespecified secondary endpoints include arrhythmia-free survival, quality of life (AFEQT), arrhythmia burden, repeat ablation, procedure duration, and fluoroscopy time. Sixteen prespecified safety endpoints are adjudicated by an independent, blinded clinical events committee.

Eligibility: Adults aged 18 years or older with symptomatic persistent or long-standing persistent atrial fibrillation, suitable for catheter ablation, who have tried at least one class I/III antiarrhythmic drug or are unwilling to do so, and who meet the intraoperative unipolar LVA criterion. Key exclusions include left atrial diameter >55 mm, recent acute coronary syndrome or coronary artery bypass grafting, severe valvular disease, prior atrial fibrillation ablation or left atrial surgery, NYHA class IV heart failure, contraindication to oral anticoagulation, dialysis-dependent renal failure, and pregnancy.

Studietype

Ingrijpend

Inschrijving (Geschat)

294

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

  • Naam: Ligang Ding, MD, PhD
  • Telefoonnummer: +8601088233162
  • E-mail: dlgang@163.com

Studie Locaties

    • Beijing Municipality
      • Beijing, Beijing Municipality, China, 100037
        • Fuwai Hospital, Chinese Academy of Medical Sciences
        • Contact:
          • Ligang Ding, MD, PhD
          • Telefoonnummer: +8601088233162
          • E-mail: dlgang@163.com
        • Hoofdonderzoeker:
          • Ligang Ding, MD, PhD

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

18 jaar en ouder (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  1. ECG-documented persistent or long-standing persistent atrial fibrillation (ESC definition).
  2. Symptoms (palpitations, dyspnea, fatigue, etc.) attributable to atrial fibrillation.
  3. Suitable for catheter ablation.
  4. At least one class I/III antiarrhythmic drug has been tried, or the patient is unwilling to try.
  5. Age 18 years or older.
  6. Intraoperative left atrial voltage mapping demonstrating a unipolar low-voltage area (cutoff 2.5 mV) of at least 10% of the post-PVI left atrial surface area (excluding the pulmonary vein antra, left atrial appendage, and fossa ovalis).

Exclusion Criteria:

  1. Left atrial diameter >55 mm on echocardiography.
  2. Acute coronary syndrome or coronary artery bypass grafting within 12 weeks.
  3. Severe aortic or mitral valve disease (ESC definition).
  4. Congenital heart disease.
  5. Prior surgical or percutaneous atrial fibrillation ablation, or atrioventricular node ablation.
  6. Prior left atrial surgery.
  7. Comorbidity with expected survival <1 year.
  8. NYHA class IV heart failure symptoms.
  9. Contraindication to oral anticoagulation.
  10. Dialysis-dependent renal failure.
  11. Atrial fibrillation due to reversible causes.
  12. Pregnancy or women of childbearing potential not using contraception.
  13. History of poor treatment adherence.
  14. Unable or unwilling to provide informed consent.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Enkel

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: PFA-PVI Plus Individualized Substrate Modification

Pulsed field ablation (PFA)-based pulmonary vein isolation plus unipolar voltage-guided individualized substrate modification. Substrate modification is selected according to low-voltage area location and may include homogenization, box isolation, linear ablation, or a combination.

Pulsed field ablation catheter and generator used to perform pulmonary vein isolation in both study arms.

Pulsed field ablation-based pulmonary vein antral isolation with confirmation of entrance and exit block in all pulmonary veins; performed in both arms.

Unipolar voltage-guided individualized substrate modification selected according to low-voltage area location, including homogenization, box isolation, linear ablation, or a combination. Performed in the experimental arm only.

Actieve vergelijker: PFA-PVI Alone

Pulsed field ablation (PFA)-based pulmonary vein isolation alone, without substrate or prophylactic ablation.

Pulsed field ablation catheter and generator used to perform pulmonary vein isolation in both study arms.

Pulsed field ablation-based pulmonary vein antral isolation with confirmation of entrance and exit block in all pulmonary veins; performed in both arms.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Treatment Success at 12 Months After the Index Ablation Procedure
Tijdsspanne: 12 months after the index ablation procedure

Freedom from documented atrial fibrillation, atrial tachycardia, or atrial flutter lasting more than 30 seconds after a 90-day blanking period while off class I/III antiarrhythmic drugs, allowing up to one repeat ablation within 6 months of the index procedure (1-2 procedures total). Patients who remain on class I/III antiarrhythmic drugs at 12 months are counted as treatment failures; missing primary outcome data are counted as treatment failures.

12 months after the index ablation procedure

Secundaire uitkomstmaten

Uitkomstmaat
Tijdsspanne
Time to First Recurrence After a Single Procedure Off Antiarrhythmic Drugs
Tijdsspanne: 12 months after the index procedure
12 months after the index procedure
Change in AFEQT Quality-of-Life Score From Baseline to 12 Months
Tijdsspanne: Baseline and 12 months
Baseline and 12 months
Incidence of Prespecified Procedure-Related Complications
Tijdsspanne: 90 days after ablation; all-cause mortality at 12 months
90 days after ablation; all-cause mortality at 12 months
Freedom From Atrial Arrhythmia at 12 Months After a Single Procedure Off Antiarrhythmic Drugs
Tijdsspanne: 12 months
12 months
Freedom From Atrial Arrhythmia at 12 Months After a Single Procedure With or Without Antiarrhythmic Drugs
Tijdsspanne: 12 months
12 months
Freedom From Atrial Arrhythmia at 12 Months After 1-2 Procedures With or Without Antiarrhythmic Drugs
Tijdsspanne: 12 months
12 months
Freedom From Atrial Fibrillation at 12 Months After 1-2 Procedures Off Antiarrhythmic Drugs
Tijdsspanne: 12 months
12 months
Atrial Arrhythmia Burden at 3, 6, and 12 Months
Tijdsspanne: 14-day period before each follow-up visit
14-day period before each follow-up visit
Time to First Recurrence After Any Number of Procedures
Tijdsspanne: 12 months
12 months
Number of Repeat Ablations Within 12 Months
Tijdsspanne: 12 months after the index procedure
12 months after the index procedure
Procedure Duration
Tijdsspanne: Index procedure
Index procedure
Total Fluoroscopy Time
Tijdsspanne: Index procedure
Index procedure

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Medewerkers

Onderzoekers

  • Hoofdonderzoeker: Ligang Ding, MD, PhD, Chinese Academy of Medical Sciences, Fuwai Hospital

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

1 november 2026

Primaire voltooiing (Geschat)

1 december 2028

Studie voltooiing (Geschat)

1 december 2029

Studieregistratiedata

Eerst ingediend

3 november 2026

Eerst ingediend dat voldeed aan de QC-criteria

3 november 2026

Eerst geplaatst (Werkelijk)

9 november 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

9 november 2026

Laatste update ingediend die voldeed aan QC-criteria

3 november 2026

Laatst geverifieerd

1 oktober 2026

Meer informatie

Termen gerelateerd aan deze studie

Andere studie-ID-nummers

  • UNI-PFA-2026-001

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Beschrijving IPD-plan

Individual participant data will not be shared. Aggregate study results will be published and presented. The informed consent and institutional data-governance approvals do not permit public deposition of individual participant data.

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .