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Empirical Anatomy-Based Ablation vs Emphasize Map-Guided Substrate Ablation in Persistent Atrial Fibrillation : (COMPASS-AF) (COMPASS-AF)

21 juli 2026 bijgewerkt door: Ju Youn Kim, Samsung Medical Center

This study is aimed to compare the clinical efficacy of two different catheter ablation strategies in patients with persistent atrial fibrillation.

Participants will be randomized 1:1 into either the Anatomy-based group or the Emphasize map-guided group

  • Anatomy-based group : Pulmonary vein isolation (PVI) using pulsed-field ablation (PFA) with a single-shot multielectrode catheter.
  • Emphasize map-guided group : PVI using radiofrequency (RF) ablation followed by additional EnSite X-guided pathologic substrate modification.

Participants will be followed for 1 year to compare the incidence of any atrial tachyarrhythmia and other clinical parameters between the two groups.

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Pulsed-field ablation (PFA) is increasingly being adopted in clinical practice due to its advantages in shortening procedure times and reducing the incidence of complications. While the majority of PFA-related research has focused on PVI-centric strategies, recent studies have reported that posterior wall isolation (PWI) using PFA can also be performed safely. However, sufficient clinical evidence regarding the efficacy of additional ablation strategies beyond PVI in patients with persistent atrial fibrillation (AF) has yet to be established.

The Emphasize mapping system, a software feature within the EnSite X platform, is designed to simultaneously visualize Voltage maps, Peak frequency, and CFAE-related information. Unlike the individual analysis of each parameter, this integrated approach allows for a more precise identification of electrophysiologically significant pathologic substrates by evaluating the complex characteristics of electrical signals holistically. Currently, however, Emphasize-guided ablation is technically limited to the use of radiofrequency (RF) energy.

Persistent AF is characterized by complex and heterogeneous mechanisms, meaning a single, uniform ablation strategy may not yield consistent clinical outcomes across all patients. Consequently, it is hypothesized that an individualized substrate ablation strategy guided by functional mapping may be more effective than a conventional, empirical anatomy-based approach.

Therefore, this study aims to compare the clinical efficacy and safety of an empirical anatomy-based ablation strategy using PFA versus an individualized Emphasize map-guided substrate ablation strategy in patients with persistent AF.

Studietype

Ingrijpend

Inschrijving (Geschat)

360

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

Studie Locaties

    • Seoul
      • Seoul, Seoul, Zuid -Korea, 06351
        • Werving
        • Samsung Medical Center
        • Contact:
      • Seoul, Seoul, Zuid -Korea, 06351
        • Nog niet aan het werven
        • Samsung Medical Center
        • Contact:

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

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Nee

Beschrijving

Inclusion Criteria:

  • Adults aged 19 years or older who have voluntarily provided written informed consent to participate in the study
  • Patients diagnosed with persistent atrial fibrillation (AF) who are scheduled to undergo catheter ablation for AF.

Exclusion Criteria:

  • History of prior catheter ablation or MAZE surgery for atrial fibrillation.
  • Left atrial (LA) diameter exceeding 60 mm.
  • Patients with end-stage renal disease (ESRD).
  • History of prior open-heart surgery.
  • Women who are pregnant, lactating, or of childbearing potential.
  • Heart failure corresponding to New York Heart Association (NYHA) functional class IV.
  • Acute coronary syndrome (ACS) experienced within the past 3 months.
  • Patients with terminal illness and a life expectancy of less than one year.
  • Any other condition that the investigator deems inappropriate for participation in the study.

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: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Actieve vergelijker: Anatomy-based group
In the empirical anatomy-based ablation strategy group, pulmonary vein isolation (PVI) will be performed using pulsed-field ablation (PFA) with a single-shot multielectrode catheter. For each pulmonary vein, approximately 4-10 pulse applications will be delivered depending on the catheter position, with each application consisting of several seconds of pulse delivery. The catheter will be positioned around the PV ostia, and electrical isolation will be achieved by utilizing various catheter configurations as necessary. The energy settings and application methods for PFA in this study will follow the manufacturer's recommended protocols and established methods from prior clinical studies. Additionally, the creation of supplementary lesion sets is permitted at the operator's discretion.
Experimenteel: Emphasize map-guided group
In the Emphasize map-guided substrate ablation group, ablation will be performed using a contact force-sensing irrigated radiofrequency (RF) catheter. Following pulmonary vein isolation (PVI), an Emphasize map will be acquired during atrial fibrillation (AF) using the EnSite X mapping system. Based on this map, electrophysiologically significant pathologic substrates will be evaluated, and additional substrate ablation will be performed. Subsequently, electrical cardioversion will be conducted to restore sinus rhythm. If sinus rhythm is not maintained or if AF is re-induced, an additional Emphasize map may be acquired in the right atrium (RA), and RA substrate ablation can be performed if necessary.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Recurrence of atrial tachyarrhythmia
Tijdsspanne: From 3 months to 12 months after the index procedure

Any documented atrial tachyarrhythmias excluding the initial 3-month blanking period. Documented atrial tachyarrhythmias (atrial fibrillation, atrial flutter, atrial tachycardia) were defined as follows:

  • Atrial tachyarrhythmias documented in 12 lead ECG
  • Atrial tachyarrhythmias of more than 30 seconds in Holter monitoring Recorded as a binary outcome (presence or absence of recurrence)
From 3 months to 12 months after the index procedure

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Atrial fibrillation burden
Tijdsspanne: From 3 months to 12 months after the index procedure
The proportion of time spent in atrial fibrillation or atrial flutter during rhythm monitoring .The burden will be assessed as percent(%) using Holter monitoring.
From 3 months to 12 months after the index procedure
Repeat ablation
Tijdsspanne: From index procedure to 12 months
Any additional catheter ablation procedure performed after the index procedure for documented recurrent atrial tachyarrhythmia during the follow-up period.
From index procedure to 12 months
Use of antiarrhythmic drug therapy
Tijdsspanne: From 3 months to 12 months after the index procedure
Percentage of patients prescribed any Class I or Class III antiarrhythmic Temporary use during the blanking period (first 3 months) will not be counted.
From 3 months to 12 months after the index procedure
Atrial Fibrillation Effect on Quality-of-life (AFEQT) questionnaire score
Tijdsspanne: From index procedure to 12 months
The AFEQT is outcome instrument designed to measure the impact of AF on a patient's health-related quality of life. Scores range from 0 to 100, with higher scores indicating a better health-related quality of life
From index procedure to 12 months
Stroke
Tijdsspanne: From index procedure to 12 months
Proportion of participants experiencing a new focal or global neurological deficit lasting ≥24 hours with imaging evidence of ischemic or hemorrhagic stroke. Transient ischemic attack will not be included.
From index procedure to 12 months
Cardiovascular hospitalization
Tijdsspanne: From index procedure to 12 months

Proportion of participants experiencing hospitalization primarily due to a cardiovascular cause, including:

  • Atrial tachyarrhythmia recurrence
  • Heart failure exacerbation
  • Acute coronary syndrome
  • Cardiovascular procedural complications
From index procedure to 12 months
Bleeding event
Tijdsspanne: From index procedure to 12 months

Proportion of participants experiencing bleeding events.

Bleeding event will be classified according to the International Society on Thrombosis and Haemostasis(ISTH) criteria:

  • Major bleeding
  • Clinically relevant non-major bleeding
From index procedure to 12 months
All-cause mortality
Tijdsspanne: From index procedure to 12 months
Death due to any cause occurring during the follow-up period.
From index procedure to 12 months
Procedure-related complications
Tijdsspanne: From index procedure to 30days

Proportion of participants experiencing any complication occurring during or within 30 days after the index procedure, including:

  • Cardiac tamponade
  • Vascular access complication
  • Pulmonary vein stenosis
  • Esophageal injury
  • Phrenic nerve injury
  • Major bleeding.
From index procedure to 30days
Procedure time
Tijdsspanne: at the index procedure
Total procedure time measured in minutes from vascular access puncture to removal of all catheters at the end of the procedure.
at the index procedure
Radiation time
Tijdsspanne: at the index procedure
Total fluoroscopy exposure time measured in minutes.
at the index procedure
Left atrial reservoir strain
Tijdsspanne: From index procedure to 12 months
Measured as percentage by echocardiography
From index procedure to 12 months

Medewerkers en onderzoekers

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Sponsor

Medewerkers

Publicaties en nuttige links

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Algemene publicaties

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 (Werkelijk)

19 mei 2026

Primaire voltooiing (Geschat)

31 december 2030

Studie voltooiing (Geschat)

31 december 2030

Studieregistratiedata

Eerst ingediend

21 juli 2026

Eerst ingediend dat voldeed aan de QC-criteria

21 juli 2026

Eerst geplaatst (Werkelijk)

24 juli 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

24 juli 2026

Laatste update ingediend die voldeed aan QC-criteria

21 juli 2026

Laatst geverifieerd

1 april 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Andere studie-ID-nummers

  • SMC 2026-02-103
  • KCT0011829 (Andere identificatie: Korea National Institute of Health)

Plan Individuele Deelnemersgegevens (IPD)

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

ONBESLIST

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

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