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Healthy Volunteer

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A volunteer subject with no known significant health problems who participates in research to test a new drug, device or intervention. These volunteers are recruited to serve as controls for patient groups. Healthy volunteers receive the same test, procedure, or drug the patient group receives.

Study phase

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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.

Search Results 1-10 of 19 for Atrial fibrillation

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  • Study status: Open/Status Unknown
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  1. A Study to Evaluate the Safety and Effectiveness of the Multi-Electrode Radiofrequency Balloon Catheter for the Treatment of Symptomatic Paroxysmal Atrial Fibrillation

    Rochester, MN

  2. A Study of Atrial Cardiopathy and Antithrombotic Drugs In Prevention After Cryptogenic Stroke

    Jacksonville, FL

  3. Study to Assess the Decline in Cognitive Function Using Standardized Neurocognitive Assessment in Atrial Fibrillation Patients Treated with Apixaban Versus Warfarin

    Rochester, MN

  4. A Study to Evaluate Decision-support Interventions for Atrial Fibrillation (RED-AF)

    Rochester, MN

  5. A Study to Compare Anticoagulation with Left Atrial Appendage Closure after AF Ablation

    Rochester, MN

  6. Stroke Mitigation in A-fib Reasoning Tool for Shared Decision Making

    Rochester, MN

  7. Assessment of the WATCHMAN™ Device in Patients Unsuitable for Oral Anticoagulation

    Rochester, MN

  8. AtRial Cardiopathy and Antithrombotic Drugs In Prevention After Cryptogenic Stroke

    Rochester, MN

  9. A Study to Evaluate Anticoagulation for Stroke Prevention and Recovery After Intracerebral Hemorrhage (ICH)

    Jacksonville, FL

  10. A Study to Identify the Self-Sustaining Core Causing Atrial Fibrillation, by Using Electrograms of Atrial and Ventricular Fibrillation to Calculate Wave Changes as Contractions Pass Through the Heart Muscle

    Scottsdale/Phoenix, AZ, Rochester, MN


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