Unipolar Voltage-Guided Substrate Modification Plus Pulsed Field Ablation Pulmonary Vein Isolation Versus Pulmonary Vein Isolation Alone in Persistent Atrial Fibrillation (UNI-PFA)
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.
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
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.
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienkontakt
Studienkontakt
- Name: Ligang Ding, MD, PhD
- Telefonnummer: +8601088233162
- E-Mail: dlgang@163.com
Studienorte
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Beijing Municipality
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Beijing, Beijing Municipality, China, 100037
- Fuwai Hospital, Chinese Academy of Medical Sciences
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Kontakt:
- Ligang Ding, MD, PhD
- Telefonnummer: +8601088233162
- E-Mail: dlgang@163.com
-
Hauptermittler:
- Ligang Ding, MD, PhD
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-
Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Inclusion Criteria:
- ECG-documented persistent or long-standing persistent atrial fibrillation (ESC definition).
- Symptoms (palpitations, dyspnea, fatigue, etc.) attributable to atrial fibrillation.
- Suitable for catheter ablation.
- At least one class I/III antiarrhythmic drug has been tried, or the patient is unwilling to try.
- Age 18 years or older.
- 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:
- Left atrial diameter >55 mm on echocardiography.
- Acute coronary syndrome or coronary artery bypass grafting within 12 weeks.
- Severe aortic or mitral valve disease (ESC definition).
- Congenital heart disease.
- Prior surgical or percutaneous atrial fibrillation ablation, or atrioventricular node ablation.
- Prior left atrial surgery.
- Comorbidity with expected survival <1 year.
- NYHA class IV heart failure symptoms.
- Contraindication to oral anticoagulation.
- Dialysis-dependent renal failure.
- Atrial fibrillation due to reversible causes.
- Pregnancy or women of childbearing potential not using contraception.
- History of poor treatment adherence.
- Unable or unwilling to provide informed consent.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Behandlung
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Single
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
|
Experimental: 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. |
|
Aktiver Komparator: 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. |
Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Treatment Success at 12 Months After the Index Ablation Procedure
Zeitfenster: 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
|
Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Zeitfenster |
|---|---|
|
Time to First Recurrence After a Single Procedure Off Antiarrhythmic Drugs
Zeitfenster: 12 months after the index procedure
|
12 months after the index procedure
|
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Change in AFEQT Quality-of-Life Score From Baseline to 12 Months
Zeitfenster: Baseline and 12 months
|
Baseline and 12 months
|
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Incidence of Prespecified Procedure-Related Complications
Zeitfenster: 90 days after ablation; all-cause mortality at 12 months
|
90 days after ablation; all-cause mortality at 12 months
|
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Freedom From Atrial Arrhythmia at 12 Months After a Single Procedure Off Antiarrhythmic Drugs
Zeitfenster: 12 months
|
12 months
|
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Freedom From Atrial Arrhythmia at 12 Months After a Single Procedure With or Without Antiarrhythmic Drugs
Zeitfenster: 12 months
|
12 months
|
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Freedom From Atrial Arrhythmia at 12 Months After 1-2 Procedures With or Without Antiarrhythmic Drugs
Zeitfenster: 12 months
|
12 months
|
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Freedom From Atrial Fibrillation at 12 Months After 1-2 Procedures Off Antiarrhythmic Drugs
Zeitfenster: 12 months
|
12 months
|
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Atrial Arrhythmia Burden at 3, 6, and 12 Months
Zeitfenster: 14-day period before each follow-up visit
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14-day period before each follow-up visit
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Time to First Recurrence After Any Number of Procedures
Zeitfenster: 12 months
|
12 months
|
|
Number of Repeat Ablations Within 12 Months
Zeitfenster: 12 months after the index procedure
|
12 months after the index procedure
|
|
Procedure Duration
Zeitfenster: Index procedure
|
Index procedure
|
|
Total Fluoroscopy Time
Zeitfenster: Index procedure
|
Index procedure
|
Mitarbeiter und Ermittler
Sponsor
Sponsor
Mitarbeiter
Mitarbeiter
Ermittler
Ermittler
- Hauptermittler: Ligang Ding, MD, PhD, Chinese Academy of Medical Sciences, Fuwai Hospital
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- UNI-PFA-2026-001
Plan für individuelle Teilnehmerdaten (IPD)
Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?
Beschreibung des IPD-Plans
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.
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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