Clinical trials
Atrial fibrillation clinical trials
An irregular, often rapid heart rhythm that can raise the risk of stroke. We’re tracking 546 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT03907046RecruitingPhase 3
Blood thinner study to prevent stroke after brain bleed
This Phase 3 study tests whether a blood thinner (apixaban) can help prevent another stroke and support recovery after you’ve had a brain bleed. You would be assigned to a treatment group, and the study checks safety and whether strokes can be reduced without causing dangerous bleeding.
Birmingham, AlabamaAges 18 years+ - NCT03987633Recruiting
Study links health records and samples to understand health gaps
This study asks people affected by a specific illness (or their family member) to share saliva (and sometimes blood) and answer health and quality-of-life questions. The goal is to better understand and reduce health inequality by matching new information with medical records.
Wolverhampton, West MidlandsAges 6 years+ - NCT04005508Recruiting
Study sleep apnea and heart outcomes in high-risk atrial fibrillation
This trial looks at how obstructive sleep apnea (OSA, a breathing problem during sleep) relates to heart outcomes in people with atrial fibrillation (AF). It may help doctors better predict risk and choose safer care for people who are high cardiovascular risk.
SingaporeAges 22–99 - NCT06529978Recruiting
CoreMap heart mapping for atrial fibrillation ablation
This study tests a new mapping system that helps doctors see the electrical signals in your heart more clearly during a standard ablation for persistent atrial fibrillation. It may improve the accuracy of the treatment.
Naples, FloridaAges 18–80 - NCT07405359Recruiting
Comparing ablation methods for persistent atrial fibrillation
This trial tests a newer, possibly safer way to treat persistent atrial fibrillation using pulsed field ablation. It compares standard vein isolation alone to adding extra ablation spots to improve success.
San Francisco, CaliforniaAges 18 years+ - NCT04075084Recruiting
Watching outcomes of routine home monitoring after a heart monitor implant
This registry study follows people who get a BIOTRONIK implantable heart monitor and use home monitoring. It looks at how routine care and at-home check-ins work in real life, which may help improve support and tracking over time.
AdelaideAges 18 years+ - NCT04247685Recruiting
MRI-safe heart rhythm test in people with atrial fibrillation
This trial checks whether a specific MRI-safe 12-lead heart recording (ECG) works correctly during MRI scans. It may help improve how doctors monitor heart rhythm while imaging, especially for people with atrial fibrillation.
Toronto, OntarioAges 18–90 - NCT04347187Recruiting
Long-term blood-thinner study for atrial fibrillation patients
This trial follows people with atrial fibrillation to see how long-term blood-thinning treatment affects outcomes over time. It may help determine which long-term approach best lowers stroke and clot risks for patients like you.
MoscowAges 18 years+ - NCT04628078Recruiting
Echocardiogram-guided heart procedure registry for atrial fibrillation
This study keeps a real-world record of people with atrial fibrillation who are planning a procedure to close off the heart’s left atrial appendage. Doctors use echocardiography (heart ultrasound) to guide the closure and track outcomes to improve care.
BernAges 18 years+ - NCT04664686Recruiting
Compare two heart-rhythm strategies after CRT for atrial fibrillation
This study looks at whether a “rate control” or “rhythm control” approach works better for people with CRT devices who still have atrial fibrillation. It aims to improve heart failure symptoms and help the heart pace more effectively.
LondonAges 18–85 - NCT04695106RecruitingPhase 4
Blood Thinner and Heart Attack Prevention Study
This study tests whether taking dabigatran (a blood thinner) combined with ticagrelor (a blood clot preventer) is safe and effective for patients with irregular heart rhythm (atrial fibrillation) who recently had a heart attack and received a stent. The goal is to prevent future blood clots while minimizing bleeding risks.
Gdansk, Pomeranian VoivodeshipAges 18 years+ - NCT04844944Recruiting
Heart registry for adults with heart failure, CAD, or atrial fibrillation
This is a hospital-based study that collects standardized information about adults with specific heart conditions—heart failure, coronary artery disease, or atrial fibrillation. It may help doctors and researchers better understand these diseases and improve future care.
BerlinAges 18 years+ - NCT07429214Recruiting
Study of a new catheter for atrial fibrillation ablation
This trial tests a new catheter system to treat atrial fibrillation (AF) by creating small scars in the heart to block faulty signals. It may help people with symptoms that continue despite medication and who are scheduled for a standard ablation procedure.
AalstAges 18–75 - NCT04964765Recruiting
3D heart mapping after early irregular heartbeat after surgery
This study uses 3D heart mapping to understand a specific kind of irregular heartbeat that can happen soon after cardiac surgery. It may help doctors better recognize what’s happening in the heart during the early recovery period.
Sankt PöltenAges 18 years+ - NCT04976348Recruiting
Heart monitoring registry for teens and adults with heart symptoms
This study registers people who are referred to cardiology or genetics for heart-failure–type symptoms or heart/cardiogenetic screening. It helps doctors understand how monitoring platforms may support diagnosis and follow-up.
Maastricht, LimburgAges 16 years+ - NCT04977076Recruiting
Stopping versus continuing blood thinner during heart catheter procedures
This study compares whether you should temporarily stop your blood thinner (DOAC) or keep taking it when you have an elective heart catheter test or procedure (coronary angiography or PCI). It aims to see which approach is safer and better for preventing bleeding and clotting around the procedure.
Heerlen, LimburgAges 18 years+ - NCT05048004Recruiting
Test of a heart procedure during atrial fibrillation ablation
This trial studies whether adding a specific technique during a first-time catheter ablation for atrial fibrillation can improve safety or outcomes. It may help doctors understand risks related to small blood clots during the procedure.
BerlinAges 18 years+ - NCT05116384Recruiting
Renal nerve ablation plus AF ablation for persistent AF
This study tests whether treating kidney-related nerves along with the usual AF (irregular heartbeat) catheter procedure works better than the usual procedure alone. It may help some people with persistent AF, but you must meet specific heart and kidney safety requirements.
Short Hills, New JerseyAges 18 years+ - NCT05227053Recruiting
Cryoablation study for paroxysmal atrial fibrillation after approval
This study looks at outcomes after a specific heart procedure called pulmonary vein isolation done with a cryoablation catheter. It is for adults with symptomatic “paroxysmal” atrial fibrillation who are planning this exact procedure.
Anchorage, AlaskaAges 18 years+ - NCT05264831Recruiting
Ablation treatment after failed electric heart shock
This trial tests whether blocking faulty heart signals from the pulmonary veins (with or without additional “substrate” modification) works better when electric cardioversion doesn’t stop persistent atrial fibrillation. It may help people who remain in atrial fibrillation after cardioversion by reducing symptoms and abnormal rhythm over time.
Caluire-et-CuireAges 18–80 - NCT05300997Recruiting
Test blood and antibody markers for suspected acute stroke
This study looks at blood tests to find signs of immune activity after a suspected stroke. It may help doctors diagnose stroke faster and better understand what is happening in the body soon after symptoms start.
Hong KongAges 18–100 - NCT05333666Recruiting
Checking how blood NOAC levels relate to outcomes
This study looks at whether the amount of a blood thinner (NOAC) in your bloodstream is linked to health outcomes. It may help doctors better understand how to monitor and use these medicines safely.
Taipei, Please SelectAges 20 years+ - NCT05353140Recruiting
Left atrial appendage device vs blood thinners after stent
This trial compares a heart device that can help prevent blood clots in the heart (called LAAO) versus long-term blood thinners for people who have atrial fibrillation and recently had a stent placed. It aims to see which approach better prevents stroke and related blood-clot problems while keeping side effects manageable.
Xi'an, ShannxiAges 18 years+ - NCT05432024Recruiting
Heart MRI checks how well ablation lesions form
This study uses a special heart MRI to look at how ablation creates scar tissue in people with atrial fibrillation. It may help doctors improve how ablation is done and understand which technique works best.
NieuwegeinAges 18 years+
Hear when a new Atrial fibrillation trial opens
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Common questions
- Are there clinical trials for atrial fibrillation?
- Yes. Clin2 currently lists 546 recruiting atrial fibrillation studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a atrial fibrillation trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a atrial fibrillation trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.