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Cryoenergy Or Radiofrequency for Pulmonary Vein Isolation

NCT00969735 · Status: COMPLETED · Phase: PHASE4 · Type: INTERVENTIONAL · Enrollment: 50

Last updated 2013-04-04

No results posted yet for this study

Summary

This is a prospective single-center randomized trial comparing the efficacy and safety of PV cryoablation with the Arctic Front® catheter versus the standard PV isolation using radiofrequency irrigated tip catheters. The efficacy of both strategies will be evaluated from a clinical point of view and from the detection and quantification of AF episodes by means of the Reveal XT® implantable loop recorder.

Conditions

Interventions

DEVICE

Pulmonary vein cryoablation

A deflectable over-the-wire cryoablation balloon catheter (Arctic Front®) will be inflated and be positioned at each PV antrum. Then, cryoenergy will be delivered for 300 seconds. During cryoablation of the right PVs, the right phrenic nerve integrity will be monitored by the observation of right hemi-diaphragm contractions in response to right phrenic nerve pacing at the superior vena cava. Once the 4 PVs are cryoablated, the Arctic Front® catheter will be replaced by a decapolar PV mapping circular catheter (Lasso®, Biosense Webster, Diamond Bar, California, EEUU) to evaluate PV conduction. A second cryoablation application may be delivered at each PV, if necessary. Crossover to RF ablation to complete PV isolation is discouraged.

DEVICE

Pulmonary vein radiofrequency ablation

Ablation approach is ostial electrical isolation of all PVs with simultaneous use of the CARTO® electroanatomic mapping system (Biosense Webster, Tirat-Ha-Carmel, Israel). PV isolation will be performed by delivering RF energy at ostial sites with earliest PV potentials. Flow rate during the RF applications will be set at 15 mL/min (baseline 2 mL/min). Temperature and power limits will be set at 45ºC and 35 W. It will be allowed a 5 W reduction in power limit setting for small PVs (angiographic supero-inferior diameter \> 12 mm), and a 5 W increase in areas located away from the esophagus, and for focal applications at sites resistant to ablation or recurrent gaps. The end-point of ablation will be to achieve bidirectional PV conduction block.

Sponsors & Collaborators

  • Spanish Society of Cardiology

    collaborator OTHER

  • Hospital San Carlos, Madrid

    lead OTHER

Principal Investigators

  • Nicasio Pérez Castellano, MD, PhD · Unidad de Arritmias, Hospital Clínico San Carlos, Madrid, Spain

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

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

Timeline & Regulatory

Start
2009-07-31
Primary Completion
2012-05-31
Completion
2012-05-31

Countries

  • Spain

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 NCT00969735 on ClinicalTrials.gov