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Study identifier: NCT07430956 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Stroke and Systemic Embolism Prevention in Adult Participants With Atrial Fibrillation for Whom Oral Anticoagulation is Unsuitable

Condition: Atrial Fibrillation (AF)  ·  Sponsor: Regeneron Pharmaceuticals

PhasePhase 3
Planned participants2628
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

This study is researching 2 different experimental drugs called REGN7508 and REGN9933 (called "study drugs"). The study is focused on people who have atrial fibrillation, which means that the heart beats too fast and unevenly. When this happens, blood cannot move smoothly through the heart; it can slow down or pool in one spot, which can lead to the formation of blood clots. REGN7508 and REGN9933 are designed to help stop blood clots forming in patients with atrial fibrillation. The aim of the study is to see how effective and safe REGN7508 and REGN9933, individually, are in preventing ischemic stroke or systemic embolism in people with atrial fibrillation who cannot or may choose to not take blood thinners. The study is looking at several other research questions, including: * What side effects may happen from taking REGN7508 or REGN9933 * How well does REGN7508 or REGN9933 lower the risk of having an ischemic stroke and/or systemic embolism compared to the placebo * How well does REGN7508 or REGN9933 lower the risk of having a major health problem affecting heart and blood circulation compared to placebo * How well does REGN7508 or REGN9933 lower the risk of death compared to placebo * How much REGN7508 or REGN9933 is in the blood at different times * Whether the body makes antibodies against REGN7508 or REGN9933 (which could make the study drugs less effective or could lead to side effects)

This description comes directly from the study's public registry record.

Talk to the study team

Clinical Trials Administrator  ·  844-734-6643  ·  clinicaltrials@regeneron.com

Always discuss trial participation with your own doctor first.

Locations (18)

SEC Clinical ResearchDothan, Alabama, United StatesRecruiting
Mission Cardiovascular Research InstituteFremont, California, United StatesRecruiting
National Institute of California Heart and Vein SpecialistsHuntington Beach, California, United StatesRecruiting
Profound Research LLC at Southern California Heart SpecialistsPasadena, California, United StatesRecruiting
Cardiology Associates Medical GroupVentura, California, United StatesRecruiting
Interventional Cardiology Medical GroupWest Hills, California, United StatesRecruiting
South Florida Research Organization LLCMedley, Florida, United StatesRecruiting
Sec Clinical ResearchPensacola, Florida, United StatesRecruiting
Clinical Site Partners, LLC DBA Flourish ResearchWinter Park, Florida, United StatesRecruiting
NSC Research, IncJohns Creek, Georgia, United StatesRecruiting
Monroe Research, LLCWest Monroe, Louisiana, United StatesRecruiting
Profound Research, Millennium CardiologyFarmington Hills, Michigan, United StatesRecruiting

+ 6 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT07430956