A Pilot Study of a Contact Force Catheter for Pulmonary Vein Antrum Isolation (CFC-PVAI)

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
University of Aarhus
ClinicalTrials.gov Identifier:
First received: February 20, 2012
Last updated: March 12, 2012
Last verified: March 2012

The knowledge of the real-time contact force leads to a greater reduction in atrial fibrillation burden after pulmonary vein antrum isolation.

Condition Intervention Phase
Atrial Fibrillation
Burden of Atrial Fibrillation
Procedure: Contact Force during ablation
Other: Standard ablation procedure
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Pilot Study of a Contact Force Catheter for Pulmonary Vein Antrum Isolation (CFC-PVAI)

Resource links provided by NLM:

Further study details as provided by University of Aarhus:

Primary Outcome Measures:
  • Reduction in atrial fibrillation burden (after 3 months blanking period) in comparison with the period prior to ablation in the absence of antiarrhythmic drugs [ Time Frame: 12 month follow after the RFA treatment ] [ Designated as safety issue: No ]
    The atrial fibrillation burden defined as the percentage of time spent i atrial fibrillation monitored by an implantable cardiac loop recorder.

Secondary Outcome Measures:
  • Contact Force distribution during procedure (g/cm2) Post ablation A-fib burden(% of time in atrial fibrillation) Complications (number) Time spent on RFA of each pulmonary vein (min.) Reconnected pulmonary veins during adenosine/isoprenaline [ Time Frame: 12 month follow up after the RFA treatment ] [ Designated as safety issue: No ]

Estimated Enrollment: 50
Study Start Date: February 2012
Estimated Study Completion Date: March 2016
Estimated Primary Completion Date: February 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Contact Force arm
the real-time contact force will be known to the operator
Procedure: Contact Force during ablation
Radio Frequency Ablation procedure with real-time contact force information known to the operator
Active Comparator: Standard
Standard ablation arm
Other: Standard ablation procedure
Standard ablation procedure

Detailed Description:

A randomized controlled study comparing pulmonary vein antrum isolation with and without the knowledge of the real-time contact force. In both groups, a catheter, which is able to measure contact force (SmartTouch, ThermoCool catheter, Biosense Webster) will be used. In the control group, the operator will be blinded to the measured contact-force. In all patients, the ablation will be guided by a circumferential mapping catheter (Lasso, Biosense Webster), CARTO 3 mapping system and ablation of adenosine-induced reconnection will be performed in all patients. Follow-up will be performed by continuous monitoring using an implantable loop recorder (Reveal XT, Medtronic Inc, Minneapolis, Minn)


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients <75 years of age with atrial fibrillation who have had at least two episodes of symptomatic paroxysmal or short-lasting persistent atrial fibrillation in the foregoing 12 months undergoing the first pulmonary vein antrum isolation can be included.
  • Patients having also persistent episodes of atrial fibrillation of shorter duration (the longest atrial fibrillation episode 3 months) on top of paroxysmal episodes will be included

Exclusion Criteria:

  • Contraindication to anticoagulation treatment with vitamin K antagonists Amiodarone therapy Expected surgery for structural heart disease within the follow-up period Significant mitral valve disease NYHA III-IV Left ventricular ejection fraction < 35% Left atrial diameter > 5 cm Secondary atrial fibrillation (e.g. post-surgery, infections, hyperthyroidism) Age < 18 years
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT01538277

Aarhus University Hospital - Skejby
Aarhus, Denmark, 8200
Sponsors and Collaborators
University of Aarhus
Study Director: Henrik k Jensen, phD, Dr Med University of Aarhus
  More Information

No publications provided

Responsible Party: University of Aarhus
ClinicalTrials.gov Identifier: NCT01538277     History of Changes
Other Study ID Numbers: CFC-PVAI
Study First Received: February 20, 2012
Last Updated: March 12, 2012
Health Authority: Denmark: National Board of Health

Keywords provided by University of Aarhus:
contact force catheter
loop recorder

Additional relevant MeSH terms:
Atrial Fibrillation
Arrhythmias, Cardiac
Heart Diseases
Cardiovascular Diseases
Pathologic Processes

ClinicalTrials.gov processed this record on April 17, 2014