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High Power Short Duration Radiofrequency Ablation of Atrial Fibrillation Using the QDOT MICRO™ Catheter

NCT06846502 · Status: ACTIVE_NOT_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 42

Last updated 2025-02-26

No results posted yet for this study

Summary

Atrial fibrillation (AF) is the most common cardiac arrhythmia worldwide, characterized by rapid and disorganized atrial activation leading to an irregular heart rhythm. Pulmonary vein isolation (PVI) ablation is the gold standard for catheter ablation based therapy. However, recurrence of AF after PVI is common, often due to the inability to create durable ablation lesions surrounding the pulmonary veins (PV). Conventional radiofrequency (RF) ablation is typically performed with power set at 30-40 Watt for a duration of 20-30 seconds. Previous studies have shown that ablation with very higher power and shorter duration (vHPSD, 90W/4sec) may result in more continuous and more durable ablation lesions with a similar safety profile as compared to conventional ablation lesions. This new technique may consequently improve outcomes of RF ablation for AF. Moreover, HPSD ablation of AF may significantly reduce RF duration, which could lead to shorter anaesthesia, fluoroscopy and procedure duration.

Cardiac magnetic resonance imaging (CMR) enables studying cardiac volumes, function and atrial tissue characteristics. By applying this imaging strategy before ablation, and directly (\<72 hours) and later (3 months) after ablation, transient (edema) and persistent (fibrosis) effects of RF ablation in the left atrial wall and surrounding tissues may be visualized and quantified.

The Q-POWER study aims to assess the effects of VHPSD RF ablation on 1) procedural characteristics, 2) acute and long-term ablation lesion formation and collateral tissue damage as assessed by CMR and 3) clinical outcomes in AF patients.

Conditions

  • Atrial Fibrillation (AF)

Interventions

PROCEDURE

Pulmonary vein isolation

Compared to conventional radiofrequency (RF) ablation, which is performed with a power set of 30-40 Watt for a duration of 20-30 seconds, ablation with higher power and shorter duration (vHPSD, 90W/4sec) may result in more continuous and more durable ablation lesions with a similar safety profile, while reducing procedure duration.

Sponsors & Collaborators

  • Amsterdam UMC, location VUmc

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2023-06-21
Primary Completion
2024-10-28
Completion
2025-11-01

Countries

  • Netherlands

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 NCT06846502 on ClinicalTrials.gov