- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01362738
Effect of Empirical Left Atrial Appendage Isolation on Long-term Procedure Outcome in Patients With Persistent or Long-standing Persistent Atrial Fibrillation Undergoing Catheter Ablation (BELIEF)
Study Overview
Status
Conditions
Detailed Description
Persistent (PeAF) and long-standing persistent (LSP) AF are defined as sustained AFs extending beyond seven days and one year respectively (1). Hypertensive, ischemic, valvular and other structural heart diseases most commonly underlie these arrhythmias (2) and the resulting abnormal atrial substrate is believed to be the major contributor toward perpetuation of AF in these non-paroxysmal categories. Several studies have demonstrated that pulmonary vein isolation (PVI) by radiofrequency catheter ablation (RFCA) though successfully restores sinus rhythm in most patients with paroxysmal AF; it has limited success in these sustained arrhythmias (3). Presence of potential trigger-generating areas in the left and right atrium besides pulmonary veins, with reported incidence from 3.2% to 47% (4), can be held responsible for this limited success. These areas include superior vena cava, ligament of Marshall, crista terminalis, coronary sinus, left atrial (LA) posterior wall and LA appendage (3). Therefore, in order to enhance the procedural-success rate, various hybrid measures have emerged to target the PV as well as extra-PV areas that have the ability to initiate or maintain AF. Several previous studies have demonstrated the prevalence of LAA firing in patients with recurrence of AF/AT (atrial tachycardia) after catheter ablation of AF (4). Embryologically, LAA is the remnant of primitive LA, which is formed by the adsorption of primordial PV and their branches during 4th week of embryonic development. Therefore, it is logical to suggest that LAA may initiate AF like pulmonary veins. In an earlier study conducted by our group on 987 AF patients, LAA firing was revealed to be the source of AF in 27% of patients and 93% of those patients were arrhythmia free 6 months after LAA isolation (4).
Our study aims to compare the procedure outcome for two different ablation strategies; 1) standard approach of pulmonary vein isolation extended to the posterior wall down to the coronary sinus and to the left side of the interatrial septum along with isolation of superior vena cava and ablation of complex fractionated atrial electrograms (CFAE) in the atria and coronary sinus, 2) standard approach plus LAA isolation.
Hypothesis: LAA isolation combined with standard ablation procedure enhances the procedural success rate in non-paroxysmal AF patients undergoing catheter ablation.
Study Type
Enrollment (Anticipated)
Phase
- Phase 3
Contacts and Locations
Study Locations
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Texas
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Austin, Texas, United States, 78705
- Texas Cardiac Arrhythmia Research Foundation
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Austin, Texas, United States, 78705
- St. David's Medical Center
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- 18-75 years
- History of PeAF or LSP AF refractory to antiarrhythmic drugs
- Willing and ability to understand and sign an informed consent
Exclusion Criteria:
- Reversible causes of AF (hyperthyroidism)
- Left atrial thrombus
- Moderate to severe valvular heart disease
- Contraindication for anticoagulation
- Life expectancy < 12 months
- Pregnancy
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Ablation of PV and extra-PV triggers
Conventional approach which includes pulmonary vein isolation (PVI) and ablation of extra-pulmonary triggers
|
PVAI and isolation of extra PV triggers
|
Active Comparator: LAA isolation along with the conventional ablation strategy
|
PVAI + isolation of extra PV triggers + LAA isolation
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Freedom from AF/ATs
Time Frame: 12 months
|
Freedom from AF/ATs, defined as no episodes of AF/AT without AADs lasting >30 seconds at follow-up
|
12 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Severe adverse events due to cardiac cause
Time Frame: 12 months
|
Severe adverse events (hospital admissions or death due to a cardiac cause)
|
12 months
|
Collaborators and Investigators
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- TCAI_BELIEF
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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Clinical Trials on RFCA of PV and extra-PV triggers
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Texas Cardiac Arrhythmia Research FoundationRCCS Monzino Hospital, Milan, Italy; Ospedale dell'Angelo, Venezia-MestreUnknownPersistent Atrial Fibrillation | Long-standing Persistent Atrial FibrillationUnited States
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Deutsches Herzzentrum MuenchenUnknownAtrial FibrillationGermany
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PrimeVax Immuno-Oncology Inc.Not yet recruitingMetastatic Melanoma
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Henry M. Jackson Foundation for the Advancement...Nabi BiopharmaceuticalsCompleted
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Johns Hopkins UniversityCompletedAtrial Fibrillation | Radiofrequency AblationUnited States
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National Institute of Allergy and Infectious Diseases...Completed
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Yonsei UniversityActive, not recruitingPersistent Atrial FibrillationKorea, Republic of
-
University of PennsylvaniaUnknownAtrial Fibrillation | Arrhythmias, CardiacUnited States
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Assiut UniversityUnknown