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Substrate Ablation and Remodelling in Non-paroxysmal Atrial Fibrillation (AF)

NCT01445925 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 130

Last updated 2013-08-22

No results posted yet for this study

Summary

The investigators hypothesise that modification of the Atrial Fibrillation (AF) substrate by radiofrequency ablation would improve single procedure success rates for Radio Frequency Ablation (RFA) for Non-paroxysmal AF when compared to that achieved with short-term peri-procedural anti-arrhythmic drug therapy alone.

Conditions

Interventions

PROCEDURE

Pulmonary vein isolation (PVI)

Using a 4mm irrigated tip radiofrequency ablation catheter a series of lesions \>2 mm outside pulmonary vein (PV) ostia will be made to encircle and electrically isolate the pulmonary veins in two ipsilateral pairs (wide area circumferential ablation, WACA). A 20-pole PV mapping catheter will be used to confirm electrical isolation. If the patient is in atrial fibrillation at this stage, sinus rhythm would be restored with electrical cardioversion and PVI would be confirmed in sinus rhythm

PROCEDURE

Pulmonary vein isolation + linear lesions

Using a 4mm irrigated tip radiofrequency ablation catheter a series of lesions \>2 mm outside PV ostia will be made to encircle and electrically isolate the pulmonary veins in two ipsilateral pairs (wide area circumferential ablation, WACA)34. A 20-pole PV mapping catheter will be used to confirm electrical isolation. Once PVI has been achieved, patients will go onto to receive additional linear ablation lesions. These will include a left atrial roof line, mitral isthmus line, (including ablation inside the coronary sinus if necessary), and ablation on the cavotricuspid isthmus. If the patient is in atrial fibrillation at this stage, the acute end-point would be signal obliteration at the ablated area. Once sinus rhythm is restored with electrical cardioversion, PVI would be confirmed in sinus rhythm and conduction block across the LA roof line, Mitral line and CTI will then be verified with appropriate pacing manoeuvres.

DRUG

Pharmacological Substrate modification

at least 6 weeks therapy with oral amiodarone prior to the ablation procedure and 6 weeks post.

Sponsors & Collaborators

  • Liverpool Heart and Chest Hospital NHS Foundation Trust

    lead OTHER

Principal Investigators

  • Dhiraj Gupta, MD DM MRCP · Liverpool Heart and Chest Hospital

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2011-09-30
Primary Completion
2014-11-30
Completion
2014-11-30

Countries

  • United Kingdom

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 NCT01445925 on ClinicalTrials.gov