Clinical trial Recruiting at 31 sites Interventional Ages 18 to 70

Using a special device to close a heart opening to prevent strokes

Official title: GORE® CARDIOFORM Septal Occluder and Antiplatelet Medical Management for Reduction of Recurrent Stroke in Patients With Patent Foramen Ovale (PFO): the REDUCE Post Approval Study

Run by W.L.Gore & Associates · NCT03821129 · Data updated 2026-11-12

This study is testing a special device to close a heart opening in people who have had a stroke to see if it can help prevent future strokes.

Quick facts

Study typeInterventional
Ages18 Years to 70 Years
SexAll
Enrollment636 (estimated)
SponsorW.L.Gore & Associates
Industry-sponsored
Locations45 sites (Tucson, Arizona and 44 other locations)
StatusRecruiting
StartedJuly 25, 2019
Main results expectedOctober 2028
Study endsOctober 2031
Registry record updatedJuly 30, 2026
Trial IDNCT03821129 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults diagnosed with an ischemic stroke of undetermined source and confirmed PFO.

Probably not a fit

Patients with a history of atrial fibrillation or other significant cardiac or neurological conditions may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study evaluates the safety and effectiveness of the GORE® CARDIOFORM Septal Occluder in patients with a Patent Foramen Ovale (PFO) who have experienced an ischemic stroke. Up to 636 adult participants will be enrolled across 40 U.S. centers, with follow-up assessments at 1 month, 6 months, 12 months, and annually for up to 5 years post-implant. The study also aims to assess the quality of operator education and the transferability of trial experiences to a post-market setting.

Why it matters

Potential benefit: If successful, this approach could significantly reduce the risk of recurrent strokes in patients with PFO.

How similar studies have gone: Previous studies have shown promise in using similar occluder devices for PFO closure, indicating potential for success in this approach.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Diagnosed with an ischemic stroke presumed to be an embolic stroke of undetermined source (ESUS) verified by a neurologist within the last 365 days prior to enrollment.
* Presence of Patent Foramen Ovale (PFO), as determined initially by positive bubble study utilizing transesophageal echocardiography (TEE) and/or transcranial Doppler (TCD), demonstrating spontaneous right-to-left shunting or right-to-left shunting during Valsalva maneuver.
* Patient is able to tolerate antiplatelet therapy
* Note: Additional Inclusion Criteria may apply

Exclusion Criteria:

* History of or ongoing atrial fibrillation/flutter
* Other co-morbidities including, but not limited to, mural thrombus, dilated cardiomyopathy, cardiac prosthetics (valves), severe native valve disease (including mitral valve stenosis), severe ventricular wall motion abnormalities, aortic dissection, significant atherosclerosis, vasculitis, pre-existing non-vascular neurologic disorders, pulmonary arteriovenous malformations, prior intracranial hemorrhage, severe disability related to prior stroke, autoimmune disorders that would increase the risk of stroke or thromboembolism, or associated with increased risk of infection or procedural complications, in the opinion of the investigator, left ventricular ejection fraction of \<40%, coexistent cause or intra-cardiac shunting (e.g. VSD or ASD)
* Previous Myocardial Infarction
* Rankin Scale sore greater than or equal to 3 at the time of procedure
* Active infection that cannot be treated successfully prior to enrollment
* Neurological deficits not due to stroke that may affect the patient's neurologic assessments
* Evidence of hypercoagulable state, Uncontrolled diabetes mellitus, uncontrolled systemic hypertension or pulmonary hypertension at the time of screening or procedure
* Sensitivity or contraindication to all proposed medical treatments or any device components
* Pregnant, lactating, or intent on becoming pregnant through 24 months after enrollment.
* Indications outside the parameters accepted for placement of GSO, including extensive congenital cardiac anomalies and defect diameters considered too large for closure with the device.
* Atrial septal anatomy that is expected to necessitate placement of more than one GORE® CARDIOFORM Septal Occluder
* Need for concomitant procedure(s) that may confound detection of adverse events related to device placement
* Note: Additional Exclusion Criteria may apply

Where it's running

  • Scripps Health La Jolla
    La Jolla, California, United States
    Recruiting
  • Loma Linda University Health
    Loma Linda, California, United States
    Recruiting
  • University of California - San Francisco
    San Francisco, California, United States
    Recruiting
  • Santa Barbara Cottage Hospital
    Santa Barbara, California, United States
    Recruiting
  • South Denver Cardiology Associates
    Littleton, Colorado, United States
    Recruiting
  • Medical Center of the Rockies
    Loveland, Colorado, United States
    Recruiting
Show 39 more locations
  • Yale University School of Medicine
    New Haven, Connecticut, United States
    Recruiting
  • Baptist Health Jacksonville
    Jacksonville, Florida, United States
    Recruiting
  • Naples Community Hospital
    Naples, Florida, United States
    Recruiting
  • University of SF (Tampa General Hospital)
    Tampa, Florida, United States
    Recruiting
  • Rush University Medical Center
    Chicago, Illinois, United States
    Recruiting
  • Northwestern University
    Evanston, Illinois, United States
    Recruiting
  • University of Iowa Hospitals & Clinic
    Iowa City, Iowa, United States
    Recruiting
  • Catholic Health Initiatives- Iowa Corp dba Iowa Heart
    West Des Moines, Iowa, United States
    Recruiting
  • Massachusetts General Hospital
    Boston, Massachusetts, United States
    Recruiting
  • University of Michigan
    Ann Arbor, Michigan, United States
    Recruiting
  • Minneapolis Heart Institute Foundation - Abbott Northwestern Hospital
    Minneapolis, Minnesota, United States
    Recruiting
  • Research Foundation SUNY Buffalo
    Buffalo, New York, United States
    Recruiting
  • Atrium Health
    Charlotte, North Carolina, United States
    Recruiting
  • Providence Heart & Vascular Institute
    Portland, Oregon, United States
    Recruiting
  • Lehigh Valley Hospital
    Allentown, Pennsylvania, United States
    Recruiting
  • Baylor College of Medicine-Houston
    Houston, Texas, United States
    Recruiting
  • The Methodist Hospital - Houston
    Houston, Texas, United States
    Recruiting
  • Baylor Scott & White Memorial Hospital
    Temple, Texas, United States
    Recruiting
  • St. Marks Hospital
    Salt Lake City, Utah, United States
    Recruiting
  • University of Utah
    Salt Lake City, Utah, United States
    Recruiting
  • University of Virginia
    Charlottesville, Virginia, United States
    Recruiting
  • Multicare Health Tacoma-Multicare Institute for Research & Innovation
    Tacoma, Washington, United States
    Recruiting
  • Charleston Area Medical Center (CAMC)
    Charleston, West Virginia, United States
    Recruiting
  • Aurora Health Care, Metro Inc.
    Milwaukee, Wisconsin, United States
    Recruiting
  • Medical College of Wisconsin, Inc.
    Milwaukee, Wisconsin, United States
    Recruiting
  • St. Mary's Hospital
    Tucson, Arizona, United States
    Withdrawn
  • Cleveland Clinic Florida
    Weston, Florida, United States
    Active not recruiting
  • Emory University
    Atlanta, Georgia, United States
    Active not recruiting
  • Alexian Brothers Medical Center
    Elk Grove Village, Illinois, United States
    Withdrawn
  • William Beaumont Hospital
    Royal Oak, Michigan, United States
    Withdrawn
  • Covenant Medical Center, Inc.
    Saginaw, Michigan, United States
    Terminated
  • University of Minnesota
    Edina, Minnesota, United States
    Withdrawn
  • Jersey Shore University / Hackensack UMC
    Freehold, New Jersey, United States
    Withdrawn
  • Columbia University Medical Center/NYPH
    New York, New York, United States
    Terminated
  • Medical University of South Carolina
    Charleston, South Carolina, United States
    Withdrawn
  • Tennova Healthcare
    Knoxville, Tennessee, United States
    Withdrawn
  • Vanderbilt University Medical Center
    Nashville, Tennessee, United States
    Terminated
  • Methodist Healthcare Systems of San Antonio d/b/a Methodist Hospital
    San Antonio, Texas, United States
    Active not recruiting
  • Sentara Cardiovascular Research Institute
    Norfolk, Virginia, United States
    Terminated

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.