Clinical Evaluation of the Blazer Open-Irrigated Ablation Catheter for the Treatment of Paroxysmal Atrial Fibrillation


  • Study type

  • Study phase

  • Study IDs

  • Describes the nature of a clinical study. Types include:

    • Observational study — observes people and measures outcomes without affecting results.
    • Interventional study (clinical trial) — studies new tests, treatments, drugs, surgical procedures or devices.
    • Medical records research — uses historical information collected from medical records of large groups of people to study how diseases progress and which treatments and surgeries work best.
  • During the early phases (phases 1 and 2), researchers assess safety, side effects, optimal dosages and risks/benefits. In the later phase (phase 3), researchers study whether the treatment works better than the current standard therapy. They also compare the safety of the new treatment with that of current treatments. Phase 3 trials include large numbers of people to make sure that the result is valid. There are also less common very early (phase 0) and later (phase 4) phases. Phase 0 trials are small trials that help researchers decide if a new agent should be tested in a phase 1 trial. Phase 4 trials look at long-term safety and effectiveness, after a new treatment has been approved and is on the market.

  • Site IRB
    • Rochester, Minnesota: 14-003000
    NCT ID: NCT01687166
    Sponsor Protocol Number: 14-003000

About this study

The purpose of this study is to establish the safety and effectiveness of the Blazer Open-Irrigated radiofrequency ablation catheter for the treatment of drug refractory, recurrent, symptomatic, paroxysmal atrial fibrillation.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.

See eligibility criteria

Inclusion Criteria:

  • History of recurrent symptomatic PAF with ≥2 episodes reported within the 365 days prior to enrollment o PAF is AF episodes that last ≥30 seconds in duration and terminate within 7 days.
  • At least 1 episode of PAF documented by Holter monitor, rhythm strip, trans-telephonic monitor (TTM), or 12-lead ECG in the 365 days prior to enrollment
  • Refractory to at least one Beta Blocker, Calcium Channel Blocker, Class I OR Class III anti-arrhythmic drug (AAD)
  • Age 18 or above, or of legal age to give informed consent specific to state and national law
  • 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:

  • Have any of the following heart conditions within 90 days prior to enrollment:
    • New York Heart Association (NYHA) Class III or IV
    • Left ventricular ejection fraction (LVEF) <35%
    • Left atrial (LA) diameter >5.5 cm
    • Unstable angina or ongoing myocardial ischemia
    • Transmural myocardial infarction (MI)
  • Congenital structural heart disease that increases the risk of ablation or precludes catheter placement
  • Undergone any left atrial catheter or surgical ablation
  • Have had a coronary intervention, cardiac surgery, or other cardiac ablation within 90 days prior to enrollment
  • Had >1 AF episode lasting greater than 7 days, with no episodes having lasted greater than 30 days, within the past year
  • Subjects regularly prescribed amiodarone therapy during the 120 days prior to enrollment
  • Contraindication to anticoagulation therapy
  • Creatinine >2.5mg/dl or creatinine clearance <30mL/min within 90 days (3 months) prior to enrollment
  • Prosthetic mitral or tricuspid heart valves
  • Confirmed cardiac thrombus within 30 days (1 month) prior to enrollment
  • Implanted pacemaker, ICD, or CRT leads within 180 days (6 months) prior to enrollment
  • History of CVA, TIA or PE within 180 days (6 months) prior to enrollment
  • Left atrial appendage closure device
  • Any other significant uncontrolled or unstable medical condition (e.g. sepsis, acute metabolic illness, end stage COPD)
  • Enrolled in any concurrent clinical trial without documented pre-approval from BSC
  • Women who are pregnant or plan to become pregnant within the course of their participation in the investigation
  • Life expectancy ≤ 2 years (730 days) per physician opinion

Participating Mayo Clinic locations

Study statuses change often. Please contact us for help.

Mayo Clinic Location Status

Rochester, Minn.

Mayo Clinic principal investigator

Siva Mulpuru, M.D.

Closed for enrollment


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