Comparing 3 approaches for atrial fibrillation (AF)
Official title: Safety in Adult Participants With Atrial Fibrillation Who Are Treated With Anticoagulation
A Phase 2, Randomized, Multicenter, Open-label, Blinded-endpoint Study to Evaluate the Safety of REGN7508 and REGN9933, Monoclonal Antibodies Against FXI, Versus Apixaban in Participants With Atrial Fibrillation (ROXI-ATLAS)
Interventions
REGN7508
Administered per the protocol
REGN9933
Administered per the protocol
Apixaban
Administered per the protocol
Canadian Sites (13)
CHU de Quebec-Universite Laval
Québec, Canada
University of Alberta Hospital - Cardiology
Edmonton, Alberta, Canada
Victoria Cardiac Arrhythmia Trials
Victoria, British Columbia, Canada
GA Research Associates Ltd.
Moncton, New Brunswick, Canada
Health sciences North - Cardiology
Greater Sudbury, Ontario, Canada
Hamilton Health Sciences Corporation
Hamilton, Ontario, Canada
Hamilton Medical Research Group (HMRG)
Hamilton, Ontario, Canada
Dr James Cha
Oshawa, Ontario, Canada
Heart Health Institute Research Inc. - Cardiology
Scarborough Village, Ontario, Canada
Viacar Recherches Cliniques Inc. - Cardiologie
Longueuil, Quebec, Canada
Centre Hospitalier Universitaire De Sherbrooke (CHUS) - Cardiologie
Sherbrooke, Quebec, Canada
Diex Recherche Inc.
Sherbrooke, Quebec, Canada
Diex Recherche Trois-rivieres
Trois-Rivières, Quebec, Canada
Eligibility Criteria
See who this study is looking for13 criteria
The trial’s own eligibility text, word for word from the registry. Only the trial site can say who takes part.
Inclusion
- +CHA2DS2-VA \[C: Congestive heart failure; H: Hypertension; A2: Age ≥75 years (double points); D: Diabetes mellitus; S2: Stroke or TIA or Thromboembolism (double points); V: Vascular disease; A: Age 65-74 years\] score ≥2 and Oral Anticoagulant (OAC) naïve or
- +Has AF or flutter (paroxysmal or persistent), not felt to be secondary to a reversible cause, and an indication for indefinite anticoagulation treatment as described in the protocolProtocolThe detailed plan a study must follow.Read more →
- +Meets one of the following:
- +CHA2DS2-VA score ≥3 or
- +CHA2DS2-VA score of 2 and at least 1 enrichment criteria as described in the protocol
- +Must have an International Normalization Ratio (INR) \<2.5 at the time of randomizationRandomisedWhich group you go into is decided by chance, not by you or your doctor.Read more → if taking warfarin or another Vitamin K Antagonist (VKA)
Exclusion
- −Has a mechanical heart valve prosthesis (Note: transcatheter aortic valve replacement is not an exclusionExclusion criteriaThe things that would prevent someone from taking part.Read more →)
- −Has known moderate-to-severe mitral stenosis
- −Has had successful ablation therapy or Left Atrial Appendage (LAA) occlusion/exclusion, or planned ablation or LAA occlusion/exclusion as described in the protocolProtocolThe detailed plan a study must follow.Read more →
- −Had an ischemic stroke within 2 days prior to randomizationRandomisedWhich group you go into is decided by chance, not by you or your doctor.Read more →
- −Has estimated Glomerular Filtration Rate (eGFR) \<15 mL/min/1.73m\^2 within 30 days prior to randomization or on dialysis or expected to be started as described in the protocol
- −Has a history of central nervous system bleeding within 30 days prior to randomization
- −Note: Other protocol-defined InclusionInclusion criteriaThe things you must have or be for a study to consider you.Read more →/ Exclusion criteria apply
In plain language
Assembled directly from this trial’s registry record. Every sentence traces to a field below — nothing here is generated or interpreted.
What this study is
This study is testing a way to prevent a condition from developing.
Phase 2Phase 2A middle-stage study looking at what a treatment does and watching for side effects.Read more → — a middle-stage study in a few hundred people at most, looking at what the treatment does and watching for side effectsSide effectAn unwanted effect thought to be caused by the treatment itself.Read more →.
What is being given or done in this study: REGN7508, REGN9933, Apixaban.
From the trial registry
Built from these fields:
- designModule.designInfo.primaryPurpose
- designModule.phases
- armsInterventionsModule.interventions[].name
How the study is run
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
One group of people involved — usually the participants — is not told which treatment is which.
From the trial registry
Built from these fields:
- designModule.designInfo.allocation
- designModule.designInfo.maskingInfo.masking
Is there a placebo?
This study does not list a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group.
One group receives an existing treatment, so the two can be compared.
There are 3 groups in this study.
From the trial registry
Built from this field:
- armsInterventionsModule.armGroups[].type
Who the study is looking for
The study lists a minimum age of 18 years, with no upper limit given.
The study is open to people of any sex.
The study does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.
These are the criteria the study lists. Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part.
From the trial registry
Built from these fields:
- eligibilityModule.minimumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How big and how long
The study aims to enrol about 1,200 people.
The study is currently expected to finish around April 2027.
The main measurement is taken over: 12 weeks.
From the trial registry
Built from these fields:
- designModule.enrollmentInfo.count
- statusModule.completionDateStruct.date
- outcomesModule.primaryOutcomes[].timeFrame
What the study measures
Incidence of any bleeding — measured over 12 weeks.
From the trial registry
Built from these fields:
- outcomesModule.primaryOutcomes[].measure
- outcomesModule.primaryOutcomes[].timeFrame
Source: NCT07175428 on ClinicalTrials.gov. The full registry text is further down this page — this summary never replaces it.
Not medical advice. What do these terms mean?
What is being tested — in plain terms
About REGN7508Drug
Administered per the protocol
From the trial registry — its own words, unedited.
What a drug is here: A medicine — a chemical or small-molecule treatment — given as the thing being studied.
Read the full explanation → · in clinical review
About REGN9933Drug
Administered per the protocol
From the trial registry — its own words, unedited.
What a drug is here: A medicine — a chemical or small-molecule treatment — given as the thing being studied.
Read the full explanation → · in clinical review
About ApixabanDrug
Administered per the protocol
From the trial registry — its own words, unedited.
What a drug is here: A medicine — a chemical or small-molecule treatment — given as the thing being studied.
Read the full explanation → · in clinical review
Common questions
Answered from this trial’s registry record. Where the record doesn’t say, these answers say so rather than filling the gap.
Am I eligible for this trial?
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part. Concord cannot make that determination, and neither can any tool that has not examined you.
What the study lists: a minimum age of 18 years.
The full inclusionInclusion criteriaThe things you must have or be for a study to consider you.Read more → and exclusion criteriaExclusion criteriaThe things that would prevent someone from taking part.Read more → are published on this page, exactly as the study team wrote them.
The useful next step is to bring this trial to your doctor. Answering a few questions first gives them something concrete to review.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.eligibilityCriteria
Is there a placebo?
This study does not list a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group.
One group receives an existing treatment so the two can be compared.
From the trial registry
- armsInterventionsModule.armGroups[].type
Would I know which treatment I am getting?
One group of people involved — usually the participants — is not told which treatment is which.
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
From the trial registry
- designModule.designInfo.maskingInfo.masking
- designModule.designInfo.allocation
Who can join?
The study lists a minimum age of 18 years, with no upper limit given.
It is open to people of any sex.
It does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can confirm whether a particular person can take part.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How long would this take?
The study's main measurement is taken over: 12 weeks.
The study as a whole is currently expected to finish around 2027-04-21.
How long any one person takes part can differ from the study length. The study team can tell you what the schedule looks like in practice.
From the trial registry
- outcomesModule.primaryOutcomes[].timeFrame
- statusModule.completionDateStruct.date
How many people are taking part?
The study aims to enrol about 1,200 people.
From the trial registry
- designModule.enrollmentInfo.count
Where is this happening?
This study lists 14 locations, including: Québec, Canada; Edmonton, Alberta, Canada; Victoria, British Columbia, Canada; Moncton, New Brunswick, Canada; Greater Sudbury, Ontario, Canada; Hamilton, Ontario, Canada, and 8 more.
Sites can open and close during a study, so confirm with the team before travelling.
From the trial registry
- trial_locations
About This Trial
This study is researching experimental drugs called REGN7508 and REGN9933. The study is focused on participants who have atrial fibrillation, which means that the heart beats too fast and unevenly. 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 well REGN7508 and REGN9933 work in patients that get medicine for their atrial fibrillation. The bleeding effects of REGN7508 and REGN9933 will be compared to another medicine (apixaban), which is available on the market to treat and prevent formation of blood clots. The study is looking at several other research questions, including: * What side effects may happen from taking REGN7508 or REGN9933 * How well do the study drugs reduce the risk of having a stroke * How much of REGN7508 or REGN9933 is in the blood at different times * Whether the body makes antibodies against REGN7508 or REGN9933 (which could make the drugs less effective or could lead to side effects)
Other Sites (3)
Profound Research, Millennium Cardiology
Farmington Hills, Michigan, United States
AA Medical Research Center (MRC)
Flint, Michigan, United States
Fairview Health Services
Maplewood, Minnesota, United States
Worth passing on?
Save it to the Care Package and send it to them, or to their doctor, in one message. Whether they follow it up is theirs to decide.
Review the Care PackageThis page is for informational purposes only and does not constitute medical advice. Clinical trial eligibility can only be determined by the trial site after proper screening. Trial information is sourced from ClinicalTrials.gov and may not reflect the most current status. Always consult your healthcare provider before making decisions about clinical trial participation.