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8110 Gatehouse Road, Falls Church, VA 22042

Champion-Af Trial: A Prospective Multicenter Randomized Trial To Evaluate The Safety And Efficacy Of The Watchman Flx Laac Device Vs. Direct Acting Oral Anticoagulants For First-Line Therapy In The Prevention Of Stroke In Patients With Nonvalvular Afib


General Information

Age Group




Protocol Number


Background Information

The Champion-AF clinical trial will compare the Watchman FLX left atrial appendage closure device to a category of blood thinners called non-vitamin K antagonist oral anticoagulation, or noacs, for effectiveness of stroke risk reduction in patients with Afib not caused by a heart valve problem.

If you decide to participate in this study, you will be “randomized” into either the “device” or “control” group. Randomization means that you are put into a group by chance, like the flip of a coin. Candidates randomized to the device group will be scheduled for a Watchman FLX implant. Control group candidates will not have the device implanted and will be prescribed a blood thinner (Noac) for the duration of the trial at the discretion of the study doctor.

The primary objective of this study is to determine if left atrial appendage closure (LAAC) with the Watchan FLX device is a reasonable alternative to non-vitamin K oral anticoagulants in patients with non-valvular atrial fibrillation.

Offered At

Inova Fairfax Medical Campus
3300 Gallows Road
Falls Church, VA 22042

Inova Center for Personalized Health
8081 Innovation Park Drive, Suite 700
Fairfax, VA 22031

Virginia Heart, Fairfax
2901 Telestar Court, Suite 200
Falls Church, VA 22042

Principal Investigator

Matthew Sherwood, MD

Eligibility Information

  • The subject is of legal age to participate in the study per the laws of their respective geography
  • The subject has documented non-valvular atrial fibrillation (i.e., atrial fibrillation in the absence of moderate or greater mitral stenosis or a mechanical heart valve)
  • The subject has a calculated CHA2DS2-Vasc (congestive heart failure, hypertension, age ≥ 75 years, diabetes mellitus, stroke or transient ischemic attack (TIA), vascular disease, age 65 to 74 years, sex category) score of 2 or greater for men and 3 or greater for women
  • The subject is deemed to be suitable for the protocol-defined pharmacologic regimens in both the test and control arms
  • The subject or legal representative is able to understand and willing to provide written informed consent to participate in the trial
  • The subject is able and willing to return for required follow-up visits and examinations

Ineligibility Information

  • Subjects who are currently enrolled in another investigational study, except when the subject is participating in a mandatory governmental registry, or a purely observational registry with no associated treatments
  • The subject requires long-term anticoagulation therapy for reasons other than AF related stroke risk reduction, for example due to an underlying hypercoagulable state (i.e., even if the device is implanted, the subjects would not be eligible to discontinue OAC due to other medical conditions requiring chronic OAC therapy)
  • The subject is contraindicated or allergic to oral anticoagulation medication and/or aspirin
  • The subject is indicated for chronic P2Y12 platelet inhibitor therapy
  • The subject had or is planning to have any cardiac or non-cardiac intervention or surgical procedure within 30 days prior to or 60 days after implant (including, but not limited to: cardioversion, percutaneous coronary intervention (PCI), cardiac ablation, cataract surgery, etc.)
  • The subject had a prior stroke (of any cause, whether ischemic or hemorrhagic) or transient ischemic attack (TIA) within the 30 days prior to enrollment
  • The subject had a prior major bleeding event per ISTH definition within the 30 days prior to randomization. Lack of resolution of related clinical sequelae or planned and pending interventions to resolve bleeding/bleeding source, are a further exclusion regardless of timing of the bleeding event
  • The subject has an active bleed
  • The subject has a reversible cause of AF or transient AF
  • The subject is absent of a LAA or the LAA is surgically ligated
  • The subject has had a myocardial infarction (MI) documented in the clinical record as either a non-ST elevation MI (NSTEMI) or as an ST-elevation MI (STEMI), with or without intervention, within 30 days prior to enrollment
  • The subject has a history of atrial septal repair or has an ASD/PFO device
  • The subject has an implanted mechanical valve prosthesis in any position
  • The subject has a known contraindication to percutaneous catheterization procedure
  • The subject has a known contraindication to TEE
  • The subject has a cardiac tumor
  • The subject has signs/symptoms of acute or chronic pericarditis
  • The subject has an active infection
  • There is evidence of tamponade physiology
  • The subject has New York Heart Association Class IV congestive heart failure at the time of enrollment
  • The subject is of childbearing potential and is, or plans to become, pregnant during the time of the study (method of assessment upon study physician’s discretion)
  • The subject has a documented life expectancy of less than 3 years
  • Transthoracic echo exclusion:
    • The subject has LVEF < 30%
    • The subject has an existing pericardial effusion with a circumferential echo-free space > 5mm
    • The subject has a high-risk patent foramen ovale (PFO) with an atrial septal aneurysm excursion > 15 mm or length > 15 mm
    • The subject has significant mitral valve stenosis (i.e., MV area < 1.5 cm 2)

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