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Unipolar Voltage Mapping for Personalized Atrial Fibrillation Ablation

NCT07630857 · Status: RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 200

Last updated 2026-06-16

No results posted yet for this study

Summary

Atrial fibrillation (AF) is a common heart rhythm disorder. While catheter ablation is an effective treatment, many patients still experience AF recurrence after the procedure. One major reason is that the mechanisms that maintain AF are not fully understood. Research suggests that the outer layer of the heart (epicardium) may play an important role in keeping AF going. However, current mapping techniques have limitations in detecting electrical signals from both the inner and outer heart layers.

This study uses a different technique called unipolar voltage mapping, which may more accurately capture electrical signals from both heart layers. Specifically, we focus on a specific type of electrical signal called "QS potential" on unipolar mapping, which reflects breakthrough sites between the inner and outer heart layers.

In this interventional study, participants with AF undergoing catheter ablation will receive personalized ablation guided by unipolar QS-potential mapping. We aim to:

Explore the relationship between unipolar QS-potentials and AF maintenance and atrial remodeling Evaluate the effectiveness of QS-potential guided personalized AF ablation

Conditions

  • Atrial Fibrillation (AF)

Interventions

PROCEDURE

Unipolar QS-Potential Guided Catheter Ablation

Participants in this arm undergo catheter ablation for atrial fibrillation guided by unipolar QS-potential mapping. Intracardiac unipolar voltage mapping is performed to identify QS-potentials, which reflect epicardial-endocardial breakthrough sites. Ablation is delivered to these identified target sites in addition to standard pulmonary vein isolation.

PROCEDURE

Conventional Pulmonary Vein Isolation

Participants in this arm undergo conventional pulmonary vein isolation for atrial fibrillation using standard bipolar voltage mapping. Ablation is performed to achieve electrical isolation of the pulmonary veins, without additional mapping-guided ablation beyond PVI.

Sponsors & Collaborators

  • China National Center for Cardiovascular Diseases

    lead OTHER_GOV

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-06-20
Primary Completion
2026-09-19
Completion
2026-12-20

Countries

  • China

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07630857 on ClinicalTrials.gov