This trial is active, not recruiting.

Conditions atrial fibrillation, burden of atrial fibrillation
Treatments contact force during ablation, standard ablation procedure
Phase phase 2
Sponsor University of Aarhus
Start date February 2012
End date September 2014
Trial size 50 participants
Trial identifier NCT01538277, CFC-PVAI


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

United States No locations recruiting
Other countries No locations recruiting

Study Design

Allocation randomized
Endpoint classification efficacy study
Intervention model parallel assignment
Masking double blind (subject, investigator, outcomes assessor)
Primary purpose treatment
the real-time contact force will be known to the operator
contact force during ablation
Radio Frequency Ablation procedure with real-time contact force information known to the operator
(Active Comparator)
Standard ablation arm
standard ablation procedure
Standard ablation procedure

Primary Outcomes

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

Secondary Outcomes

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

Eligibility Criteria

Male or female participants at least 18 years old.

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

Additional Information

Official title A Pilot Study of a Contact Force Catheter for Pulmonary Vein Antrum Isolation (CFC-PVAI)
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)
Trial information was received from ClinicalTrials.gov and was last updated in September 2014.
Information provided to ClinicalTrials.gov by University of Aarhus.