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Ultra-High-Resolution Mapping Guided Partial Antral Ablation for AF

NCT03759912 · Status: TERMINATED · Type: OBSERVATIONAL · Enrollment: 75

Last updated 2023-05-31

No results posted yet for this study

Summary

The electrical isolation of the pulmonary veins (PVI) is the cornerstone of current ablation techniques for the treatment of atrial fibrillation (AF) because the PV is the most common trigger of AF. Wide bi-antral circumferential ablation (WACA) is more effective than segmental PV isolation in achieving freedom from total atrial tachyarrhythmia recurrence at long-term follow-up. Therefore, it is widely accepted as initial ablation strategy. However, the WACA technique requires a much larger number of ablation and higher energy to achieve complete isolation because of thick atrial myocardial sleeves with multiple muscle layers present in most of the PV antrum, which is less likely to achieve homogenous transmural lesions in the entire circumference with the currently available ablation technologies. Meanwhile, muscular discontinuities and abrupt changes of the fiber orientation in human PV-Left atrium (LA) junction are previously reported, and electrical PV isolation can usually be achieved without complete circumferential ablation. However, the current electroanatomical mapping (EAM) system has a limitation to understand the complex relationship of PV-LA junction mainly due to relatively low resolution.

The Rhythmia mapping system (BostonScientific, Inc, Cambridge, MA) is a new system provides ultra-high-resolution EAM using a small basket array of 64 electrodes (IntellaMap Orion, Boston Scientific). Owing to better resolution, this new system capable of rapidly and accurately identify critical isthmuses and low-voltage regions of interest and also allows automatic acquisition and accurate annotation of the electrograms, without the need for manual correction.

In this context, we hypothesized that rapid and precise identification of activation pattern of PV-LA junction by Rhythmia system could allow complete, durable electrical isolation of PVs without circumferential antral ablation.

Conditions

Sponsors & Collaborators

  • Boston Scientific Corporation

    collaborator INDUSTRY

  • Keimyung University Dongsan Medical Center

    lead OTHER

Principal Investigators

  • Seongwook Han, MD, PhD · Keimyung University

Eligibility

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

Timeline & Regulatory

Start
2018-11-20
Primary Completion
2020-08-05
Completion
2021-08-07

Countries

  • South Korea

Study Locations

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Entities

Diseases

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 NCT03759912 on ClinicalTrials.gov