Surgical or Catheter Ablation of Lone Atrial Fibrillation (AF) Patients (SCALAF)

The recruitment status of this study is unknown because the information has not been verified recently.
Verified October 2012 by Medtronic Bakken Research Center.
Recruitment status was  Recruiting
Sponsor:
Information provided by (Responsible Party):
Medtronic Bakken Research Center
ClinicalTrials.gov Identifier:
NCT00703157
First received: June 19, 2008
Last updated: October 9, 2012
Last verified: October 2012

June 19, 2008
October 9, 2012
November 2007
December 2012   (final data collection date for primary outcome measure)
Difference in AF burden after ablation therapy measured with REVEAL-XT. [ Time Frame: Dec. 2011 ] [ Designated as safety issue: No ]
Same as current
Complete list of historical versions of study NCT00703157 on ClinicalTrials.gov Archive Site
Not Provided
Not Provided
Not Provided
Not Provided
 
Surgical or Catheter Ablation of Lone Atrial Fibrillation (AF) Patients
The SCALAF Success Trial

Prospective randomized observational trial comparing the efficacy of circumferential pulmonary vein ostia ablation using surgical versus catheter techniques in the treatment of paroxysmal atrial fibrillation. Success rate determined by REVEAL-XT (AF implantable monitoring device).

Title: Surgical or Catheter Ablation in patients with Lone Atrial Fibrillation: determination of acute and long term SUCCESS (SCALAF-success trial).

Background: Anti-arrhythmic drugs are used in daily practice to treat patients with paroxysmal idiopatic AF. Often the origin of the AF can be found in the muscle sleeves running up the pulmonary veins. Drug treatment is not always successful and prone to evoke negative side effects. The surgical MAZE procedure was applied in the past, but this is a time consuming, cumbersome technique, often associated with significant complications. Cardiac radio-frequency ablation offers an alternative, easy and less time consuming treatment: lesions prevent normal electrical wave front propagation and might stop the continuation of atrial fibrillation wave fronts. Ablation can be implemented by use of special catheters inserted via the groin or using the Medtronic Carbioblate® Surgical Ablation System applied via minimal invasive surgical techniques.

Purpose: Compare the effectiveness of pulmonary vein isolation achieved via catheter or via surgical ablation techniques to treat patients with paroxysmal lone AF.

Study design: A prospective, randomized multi-center observational study.

Patients: Patients suffering from paroxysmal idiopatic AF (no associated or underlying structural heart disease) complying with following inclusion criteria:

  • minimally one documented AF-episode in the last 6 months;
  • refractory to at least 2 class I or III anti-arrhythmic drugs;
  • age > 18 year Intervention: Patients are randomized to either the surgical or the catheter ablation group and receive the indicated treatment. During the critical assessment period, the patients are weaned from anti-arrhythmic medication.

Primary endpoint: Reduction in AF occurrence measured by the AF-burden parameter in the critical period between 3 and 6 months post-ablation. AF burden is measured automatically by means of the Reveal XT, implanted at study enrolment to document the baseline characteristics.

Secondary endpoints: - Failure of therapy requiring re-interventions;

  • Duration, burden and costs of ablation procedures:
  • Reduction in frequency, duration and level of severity of AF symptoms;
  • Symptoms associated with AF;
  • Reduced necessity of anti-arrhythmic or anticoagulant medication;
  • Left atrial dimensions and contractility
  • Adverse events associated with the ablation therapy;
  • Occurrence of other clinical adverse events (TIA, CVA, bleeds, tamponade, MI) at 3, 6, 12 and 24 months of follow up Risk assessment: Possible side effects : irregular heart rhythm, pericardial fluid, stroke, heart infarct, disturbances of the conduction system in the heart, local pain at the site of incisions, heart failure or reduced pump function of the heart.

Possible benefits: Regulation of the heart rhythm without applying MAZE procedure or opening of the thorax. Reduction or relieve from symptoms associated with AF. Partial or complete reduction of anti-arrhythmic medication. Control of anti-coagulant medication. Improved quality of life for the patients.

Hospital follow up: Follow-up visits are planned at study entrance and Reveal XT implant, assessment of baseline, application of the ablation therapy, discharge from hospital, and a 3, 6, 12 and 24 months post-ablation.

Interventional
Not Provided
Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Atrial Fibrillation
  • Procedure: Catheter Ablation
    Patients undergoing left atrial circumferential pulmonary vein ostia ablation.
  • Procedure: Surgical Ablation
    patients undergoing left atrial circumferential pulmonary vein ostia ablation via minimal invasive surgery.
  • Active Comparator: 1
    Arm 1: Catheter Ablation
    Intervention: Procedure: Catheter Ablation
  • Active Comparator: 2
    Arm 2: Surgical Ablation. patients undergoing left atrial circumferential pulmonary vein ostia ablation via minimal invasive surgery
    Intervention: Procedure: Surgical Ablation
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruiting
80
December 2012
December 2012   (final data collection date for primary outcome measure)

Inclusion Criteria:

  • Patient has documented Paroxysmal AF as defined by the ACC/AHA/ESC guidelines
  • Minimal one documented AF episode in the last 6 months
  • Refractory to minimal two Class I or III anti-arrhythmic drug
  • Age > 18 years
  • Signed and dated the Patient Informed Consent.
  • Patient can tolerate anti-coagulation therapy (Warfarin/Coumadin)

Exclusion Criteria:

  • Patient has a structural heart disease
  • Ejection fraction < 40 %
  • Echocardiographic evidence for a left atrium > 45 mm (parasternal axis)
  • Patients on amiodarone, or patients known to be intolerant for amiodarone
  • Dextrocardia, current endocarditis, systemic infection, renal failure
  • Patient has known cerebrovascular disease, including a history of stroke, CVA or TIA
  • Pregnancy at enrolment; or planned pregnancy within the follow up period
  • Patient has a life expectancy less than 1 year
  • The subject is participating in another device or drug study
  • The patient is unable and/or unwilling to cooperate with study procedures or required follow up visits
  • Echocardiographic (TTE) evidence for presence of left atrial thrombus
  • Previous (cardio-) thoracic surgery
  • Previous left atrial ablation
  • Patients with permanent or persistent AF
Both
18 Years and older
No
Contact: Pascal Smeets 31-43-3566671 pascal.smeets@medtronic.com
Contact: Bèr Kleijnen 31-43-3566812 bèr.kleijnen@medtronic.com
Netherlands
 
NCT00703157
BRC-CS
No
Medtronic Bakken Research Center
Medtronic Bakken Research Center
Not Provided
Principal Investigator: Hauw Sie, MD Isala Klinieken Zwolle
Medtronic Bakken Research Center
October 2012

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP