Prospective Clinical Study of the Guidant Microwave Ablation System for the Treatment of PAF in the MIS Procedure

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00415558
Recruitment Status : Terminated (Low enrollment)
First Posted : December 25, 2006
Last Update Posted : June 9, 2009
Information provided by:
Maquet Cardiovascular

Brief Summary:
The purpose of this prospective, single-arm, un-blinded, multi-site clinical study is to assess the safety and efficacy of the Microwave Ablation System for the treatment of symptomatic paroxysmal atrial fibrillation (PAF) in the minimally invasive surgical (MIS) procedure in approximately 30 patients at 6 investigational sites in the United States.

Condition or disease Intervention/treatment Phase
Atrial Fibrillation Device: Microwave Ablation System Not Applicable

Detailed Description:
The study population for this study will be comprised of patients who have been diagnosed with symptomatic (PAF) for at least 6 months prior to study entry. Patients will be qualified for the study if they meet stringent inclusion/exclusion criteria, signing an informed consent and agreeing to return for followup visits at 1, 3, 6, 9 and 12 months. All study patients will receive microwave ablation to treat their symptomatic PAF. The Microwave Ablation System will be used during a MIS procedure on a beating heart in order to ablate a specified lesion pattern.

Study Type : Interventional  (Clinical Trial)
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Prospective, Multicenter, Un-Blinded, Single Arm, Clinical Study Using the Guidant Microwave Ablation System Comprised of the Flex 10 Ablation Probe and Microwave Generator for Patients With Symptomatic Paroxysmal Atrial Fibrillation
Study Start Date : May 2007

Resource links provided by the National Library of Medicine

U.S. FDA Resources

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All

Inclusion Criteria:

  • Patient is greater than or = 18 years of age
  • Patient has documented symptomatic paroxysmal atrial fibrillation (PAF) refractory to at least 1 antiarrhythmic (Class IA, IC, III) drug.
  • Patient has episodes of symptomatic AF including, but not limited to, palpitations, lightheadedness, fatigue, dyspnea, and/or chest pain.
  • A minimum of a 6-month history of symptomatic paroxysmal AF (documented by patient report in the medical record).
  • A minimum of 2 discrete symptomatic paroxysmal AF episodes in the month prior to study entry. Paroxysmal AF rhythm must be documented by objective evidence (12-lead electrocardiogram [ECG], Holter monitor, event monitor, or other telemetry rhythm strip) with the presence of sinus rhythm and/or underlying rhythm between episodes.
  • Patient has been informed of the nature of the study, agreed to its provisions, and provided written informed consent.

Exclusion Criteria:

  • Patient had a cerebral vascular accident or transient ischemic attack within the previous 6 months.
  • Patient had a myocardial infarction within the previous 6 weeks.
  • Patient has underlying metabolic etiology related to AF (e.g., hyperthyroidism, metabolic disorder).
  • Patient has significant underlying structural heart disease (e.g., valvular disease, presence of aneurysm, left ventricular hypertrophy) requiring surgical or procedural intervention.
  • Patient with prior catheter ablation procedure for the treatment of AF within the previous 6 months.
  • Patient has evidence of, or history of, 50% or more stenosis in any pulmonary vein.
  • Patient had a previous thoracic procedure resulting in sternal opening and/or pericardial opening (e.g., surgical ablation, coronary artery bypass graft [CABG], or valve repair).
  • Patient has a left atrial size > 6.0 cm measured on echocardiogram.
  • Patient has a left ventricular ejection fraction (LVEF) < 35%.
  • Patient requires treatment for CAD (coronary artery disease) or has untreated unstable angina.
  • Patient has a presence of esophageal fistula or esophageal stricture, untreated esophagitis, varices, dysphagia, or odynophagia caused by anatomical abnormality or other diseases contraindicating transesophageal echocardiography.
  • Patient has severe chronic obstructive pulmonary disease.
  • Patient has a known allergy or contraindication to Coumadin (warfarin) therapy, or inability to comply with Coumadin (warfarin) therapy.
  • Patient has a known allergy or contraindication to complying with antiarrhythmic (Class IA, IC, III) therapy.
  • Patient has an acute illness or active systemic infection or sepsis.
  • Patient has a co-morbidity with life expectancy of less than one year or protocol non-compliance that would limit follow-up.
  • Patient is geographically remote and/or unable to return for follow-up examinations.
  • Patient is pregnant or is planning to become pregnant during the study.
  • Patient is enrolled in any concurrent study.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00415558

United States, Arizona
Mesa, Arizona, United States
United States, California
Chico, California, United States
Long Beach, California, United States
United States, Michigan
Saginaw, Michigan, United States
United States, Wisconsin
Madison, Wisconsin, United States
Sponsors and Collaborators
Maquet Cardiovascular
Principal Investigator: Li Poa, MD Enloe Medical Center
Principal Investigator: Dudley Hudspeth, MD Banner Desert Medical Center
Principal Investigator: Daniel Bethencourt, MD Long Beach Memorial Medical Center
Principal Investigator: Niloo Edwards, MD University of Wisconsin Hospitals and Clinics
Principal Investigator: Norbert Baumgartner, MD Covenant Medical Center

Responsible Party: Maquet Cardiovascular Identifier: NCT00415558     History of Changes
Other Study ID Numbers: VR2049541
First Posted: December 25, 2006    Key Record Dates
Last Update Posted: June 9, 2009
Last Verified: June 2009

Keywords provided by Maquet Cardiovascular:
Atrial Fibrillation

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