Clinical Evaluation of the Blazer® Open-Irrigated Catheter for Treatment of Type 1 Atrial Flutter

NCT ID: NCT01253200

Last Updated: 2018-03-19

Study Results

Results available

Outcome measurements, participant flow, baseline characteristics, and adverse events have been published for this study.

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

302 participants

Study Classification

INTERVENTIONAL

Study Start Date

2011-01-31

Study Completion Date

2014-01-31

Brief Summary

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The purpose of the BLOCk-CTI study is to evaluate the safety and effectiveness of the Blazer® Open-Irrigated Ablation Catheter for the treatment of sustained or recurrent type 1 atrial flutter. This study will compare outcomes in patients treated with the Blazer® Open-Irrigated Ablation Catheter to outcomes in patients treated with open-irrigated radiofrequency ablation catheters that have received FDA market approval for the treatment of type 1 atrial flutter.

Detailed Description

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The BLOCk-CTI study is a prospective, multicenter, single blind, 1:1 randomized study. The study is designed to demonstrate that the safety and effectiveness of the Blazer® Open-Irrigated Ablation Catheter are non-inferior to the safety and effectiveness of the control catheters. In this study, the control catheters are open-irrigated radiofrequency ablation catheters that have received FDA market approval for the treatment of type 1 atrial flutter. (Biosense Webster ThermoCool® ablation catheters (NaviStar™, EZ Steer, or SF) or St. Jude Medical ablation catheters (Therapy™ Cool Path™ or Safire BLU™).

Conditions

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Atrial Flutter

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Participants
Subject was not told by investigator if device used was Investigational or Control. The subject could ask the investigator at end of study at 3 months if they wanted to know which device was used.

Study Groups

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Blazer® Open-Irrigated Ablation Catheter

Patients treated with the Blazer® Open-Irrigated Ablation Catheter

Group Type EXPERIMENTAL

Blazer® Open-Irrigated Ablation Catheter

Intervention Type DEVICE

Blazer® Open-Irrigated Ablation Catheter

Control Catheter

Patients treated with an open-irrigated radiofrequency ablation catheter that has received FDA market approval for the treatment of type 1 atrial flutter( Biosense Webster ThermoCool® ablation catheters (NaviStar™, EZ Steer, or SF) or St. Jude Medical ablation catheters (Therapy™ Cool Path™ or Safire BLU™),

Group Type ACTIVE_COMPARATOR

Control Catheter

Intervention Type DEVICE

Open-irrigated radiofrequency ablation catheters that have received FDA market approval for the treatment of type 1 atrial flutter

Interventions

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Blazer® Open-Irrigated Ablation Catheter

Blazer® Open-Irrigated Ablation Catheter

Intervention Type DEVICE

Control Catheter

Open-irrigated radiofrequency ablation catheters that have received FDA market approval for the treatment of type 1 atrial flutter

Intervention Type DEVICE

Other Intervention Names

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ThermoCool, NaviStar, EZ Steer, SF, Cool Path, Safire BLU

Eligibility Criteria

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Inclusion Criteria

* At least 1 documented episode of type 1 atrial flutter in the 180 days (6 months) preceding enrollment documented by 12-lead ECG, Holter monitor, rhythm strip, or transtelephonic monitor
* Patients are clinically indicated for catheter ablation
* Patients receiving oral anti-arrhythmic drug therapy (class I or class III) for a tachyarrhythmia other than type 1 atrial flutter must be controlled on the anti-arrhythmic drug for a minimum of 30 days prior to enrollment. If type 1 atrial flutter was documented prior to the development of other tachyarrhythmias, this 30-day period is not required.
* Age 18 or above, or of legal age to give informed consent specific to state and national law
* Patients are competent and willing to provide written informed consent to participate in the study and agree to comply with follow-up visits and evaluation

Exclusion Criteria

* Any prior right atrial cavo-tricuspid isthmus ablation or any cardiac ablation for non-atrial flutter arrhythmias within 90 days prior to enrollment
* Cardiac surgery within 90 days prior to enrollment
* Myocardial infarction within 60 days prior to enrollment
* Current unstable angina
* Patients who cannot have anti-arrhythmic drugs (class I and class III) prescribed for the treatment of type 1 atrial flutter stopped on the day of the procedure
* Patients regularly prescribed amiodarone within the 120 days (4 months) prior to enrollment
* Documented atrial or ventricular tumors, clots, thrombus, or have a known clotting disorder within 90 days prior to enrollment
* Implantation of permanent leads of an implantable device in or through the right atrium within 90 days prior to enrollment
* Direct remedial cause of atrial flutter (e.g. thyroid disease, pericarditis, pulmonary embolic disease)
* Atypical or scar-based flutter
* Patients with New York Heart Association Class III at the time of enrollment or New York Heart Association Class IV heart failure within 90 days prior to enrollment
* Patients with an ejection fraction less than 30% within 90 days prior to enrollment
* Clinically significant structural heart disease (including tricuspid valve regurgitation, tricuspid valve stenosis, tricuspid valve replacement, Ebstein's anomaly, or other congenital heart disease) that would preclude catheter introduction and placement, as determined by the Investigator
* Any cerebral ischemic event (including transient ischemic attacks) within 180 days prior to enrollment
* Contraindication to anticoagulation therapy based upon published guidelines
* Creatinine greater than 2.5 mg/dl or creatinine clearance less than 30 mL/min within 90 days prior to enrollment
* Any other significant uncontrolled or unstable medical condition (e.g. sepsis, acute metabolic illness)
* Enrolled in any concurrent study without BSC written approval
* Women who are pregnant or plan to become pregnant within the course of their participation in the investigation
* Life expectancy less than or equal to 2 years (730 days) per physician opinion
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Boston Scientific Corporation

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Tom McElderry, MD

Role: PRINCIPAL_INVESTIGATOR

University of Alabama at Birmingham

Locations

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University of Alabama at Birmingham

Birmingham, Alabama, United States

Site Status

St. Jude Medical Center

Fullerton, California, United States

Site Status

Regional Cardiology Associates

Sacramento, California, United States

Site Status

Colorado Springs Cardiologist, P.C.

Colorado Springs, Colorado, United States

Site Status

Washington Hospital Center

Washington D.C., District of Columbia, United States

Site Status

West Coast Arrhythmia Center

Hudson, Florida, United States

Site Status

Tallahassee Memorial Hospital

Tallahassee, Florida, United States

Site Status

Emory University Hospital

Atlanta, Georgia, United States

Site Status

Georgia Health Sciences University

Augusta, Georgia, United States

Site Status

University of Kansas Hospital

Kansas City, Kansas, United States

Site Status

Central Baptist Hospital

Lexington, Kentucky, United States

Site Status

Brigham and Women's Hospital

Boston, Massachusetts, United States

Site Status

Caritas St. Elizabeth's Medical Center

Boston, Massachusetts, United States

Site Status

Henry Ford Hospital

Detroit, Michigan, United States

Site Status

Nebraska Heart Institute

Lincoln, Nebraska, United States

Site Status

Strong Memorial Hospital of the University of Rochester

Rochester, New York, United States

Site Status

Moses H. Cone Memorial Hospital

Greensboro, North Carolina, United States

Site Status

Cleveland Clinic Foundation

Cleveland, Ohio, United States

Site Status

Ohio State University Medical Center

Columbus, Ohio, United States

Site Status

Ohio Health Research Institute

Columbus, Ohio, United States

Site Status

ProMedica Toledo Hospital

Toledo, Ohio, United States

Site Status

Medical University of South Carolina

Charleston, South Carolina, United States

Site Status

Texas Cardiac Arrhythmia Research

Austin, Texas, United States

Site Status

Hall Garcia Cardiology

Houston, Texas, United States

Site Status

Sentara Norfolk General Hospital

Norfolk, Virginia, United States

Site Status

Swedish Medical Center

Seattle, Washington, United States

Site Status

Countries

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United States

Other Identifiers

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BLOCk-CTI

Identifier Type: -

Identifier Source: org_study_id

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