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Stroke and Systemic Embolism Prevention in Adult Participants With Atrial Fibrillation (ROXI-EVEREST)

29. maj 2026 opdateret af: Regeneron Pharmaceuticals

A Phase 3, Randomized, Multicenter, Double-blind Study to Assess Stroke and Systemic Embolism Prevention With REGN7508, a Monoclonal Antibody Against Factor XI, Versus Apixaban in Participants With Atrial Fibrillation (ROXI-EVEREST)

This study is researching an experimental drug called REGN7508 (called "study drug") and how it compares against another treatment called apixaban. The study is focused on people who have atrial fibrillation, which means that the heart beats too fast and unevenly.

The aim of the study is to see how safe and effective REGN7508 is in preventing stroke and/or systemic embolism in participants with atrial fibrillation and how it compares against participants that will receive apixaban in this study.

The study is looking at several other research questions, including:

  • What side effects may happen from taking the study drug
  • Whether the body makes antibodies against the study drug (which could make the study drug less effective or could lead to side effects)

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

15364

Fase

  • Fase 3

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Key Inclusion Criteria:

  1. Has AF or flutter (paroxysmal or persistent), not considered to be secondary to a reversible cause, and an indication for indefinite anticoagulation treatment as described in the protocol

  2. Meets one of the following:

    1. CHA2DS2-VA [C: Congestive heart failure; H: Hypertension; A2: Age ≥75 years (double points); D: Diabetes mellitus; S2: Stroke or TIA or Systemic embolism (double points); V: Vascular disease; A: Age 65-74 years] score ≥2 and Oral Anticoagulant (OAC) naïve OR
    2. CHA2DS2-VA score ≥3 OR
    3. CHA2DS2-VA score of 2 AND at least 1 enrichment criteria as described in the protocol
  3. Must have an International Normalized Ratio (INR) <2.5 at the time of randomization if taking warfarin or another Vitamin K Antagonist (VKA)

Key Exclusion Criteria:

  1. Has a mechanical heart valve prosthesis (Note: transcatheter aortic valve replacement is not an exclusion)
  2. Has known moderate-to-severe mitral stenosis
  3. Has had a successful ablation therapy without documented recurrent AF or a participant after Left Atrial Appendage (LAA) occlusion/exclusion or plan for ablation or LAA occlusion/exclusion within the next 6 months starting from randomization
  4. Had an ischemic stroke within 2 days prior to randomization
  5. Has persistent, uncontrolled hypertension (per investigator's discretion)
  6. Has estimated Glomerular Filtration Rate (eGFR) <15 mL/min/1.73m2 within 30 days prior to randomization or is on dialysis or expected to be started on dialysis within the next 6 months starting from randomization

Note: Other protocol-defined Inclusion/ Exclusion criteria apply

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Firedobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: REGN7508 + Placebo
Medicin: Placebo
Administreret i henhold til protokollen
Medicin: Regn7508
Administreret pr. Protokol
Andre navne:
  • cenvacibart
Aktiv komparator: Apixaban + Placebo
Medicin: Placebo
Administreret i henhold til protokollen
Medicin: Apixaban
Administreret pr. Protokol

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
Time to first occurrence of stroke (ischemic, hemorrhagic, or of unspecified type) or systemic embolism
Tidsramme: Approximately 36 months
Approximately 36 months
Time to first occurrence of International Society on Thrombosis and Haemostasis (ISTH) major bleeding or ISTH Clinically Relevant Non-Major (CRNM) bleeding
Tidsramme: Approximately 36 months
Approximately 36 months

Sekundære resultatmål

Resultatmål
Tidsramme
Time to first occurrence of stroke (ischemic, hemorrhagic, or of unspecified type), systemic embolism, ISTH major bleeding, or ISTH CRNM bleeding
Tidsramme: Approximately 36 months
Approximately 36 months
Time to first occurrence of stroke (ischemic, hemorrhagic, or of unspecified type), systemic embolism, or ISTH major bleeding
Tidsramme: Approximately 36 months
Approximately 36 months
Time to first occurrence of stroke (ischemic, hemorrhagic, or of unspecified type), systemic embolism, ISTH major bleeding, or all-cause death
Tidsramme: Approximately 36 months
Approximately 36 months
Time to first occurrence of ISTH major bleeding
Tidsramme: Approximately 36 months
Approximately 36 months
Time to first occurrence of hemorrhagic stroke, intracerebral hemorrhage, or hemorrhagic transformation of an ischemic stroke
Tidsramme: Approximately 36 months
Approximately 36 months
Time to occurrence of fatal bleeding
Tidsramme: Approximately 36 months
Approximately 36 months
Number of ISTH major bleeding events
Tidsramme: Approximately 36 months
Approximately 36 months
Number of ISTH CRNM bleeding events
Tidsramme: Approximately 36 months
Approximately 36 months
Number of minor bleeding events
Tidsramme: Approximately 36 months
Approximately 36 months
Time to all-cause death
Tidsramme: Approximately 36 months
Approximately 36 months
Occurrence of Treatment-Emergent Adverse Events (TEAEs)
Tidsramme: Approximately 39 months
Approximately 39 months
Severity of TEAEs
Tidsramme: Approximately 39 months
Approximately 39 months
Occurrence of Anti-Drug Antibodies (ADA) to REGN7508
Tidsramme: Approximately 36 months
Approximately 36 months
Magnitude of ADA to REGN7508
Tidsramme: Approximately 36 months
Approximately 36 months

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Regeneron Pharmaceuticals

Efterforskere

  • Studieleder: Clinical Trial Management, Regeneron Pharmaceuticals

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

31. juli 2026

Primær færdiggørelse (Anslået)

11. september 2029

Studieafslutning (Anslået)

10. december 2029

Datoer for studieregistrering

Først indsendt

29. maj 2026

Først indsendt, der opfyldte QC-kriterier

29. maj 2026

Først opslået (Faktiske)

4. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

29. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • R7508-CVA-24114
  • 2025-521617-97-00 (Ctis)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

All Individual Patient Data (IPD) that underlie publicly available results will be considered for sharing

IPD-delingstidsramme

When Regeneron has:

  • received marketing authorization from major health authorities (e.g., FDA, European Medicines Agency (EMA), Pharmaceuticals and Medical Devices Agency (PMDA), etc.) for the product and indication or has globally discontinued development of the product for all indications on or after April 2020 and has no plans for future development
  • made the study results publicly available (e.g., scientific publication, scientific conference, clinical trial registry)
  • the legal authority to share the data, and
  • ensured the ability to protect participant privacy

IPD-delingsadgangskriterier

Qualified researchers can submit a proposal for access to individual patient or aggregate level data from a Regeneron-sponsored clinical trial through Vivli. Regeneron's Independent Research Request Evaluation Criteria can be found at: https://www.regeneron.com/sites/default/files/Regeneron-External-Data-Sharing-Policy-and-Independent-Research-Request-Evaluation-Criteria.pdf

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • ANALYTIC_CODE
  • CSR

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Atrieflimren (AF)

Kliniske forsøg med Placebo

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