Cardiology
Heart & circulation clinical trials
Heart disease, blood pressure, and disorders of the blood vessels and circulation. We’re tracking 9,982 recruiting studies in this area right now.
By phase
- Not applicable7,962
- Phase 2481
- Phase 4481
- Phase 3447
- Phase 1361
- Phase 1/Phase 2163
- Phase 2/Phase 387
Top conditions
- Stroke844
- Heart Failure566
- Hypertension400
- Cardiovascular Diseases389
- Coronary Artery Disease370
- Multiple Myeloma332
- Atrial Fibrillation267
- Ischemic Stroke200
- Atrial Fibrillation (AF)141
- Acute Ischemic Stroke139
- Pulmonary Hypertension100
- Myocardial Infarction99
- Congenital Heart Disease86
- Stroke, Ischemic85
- Peripheral Arterial Disease83
- Acute Coronary Syndrome82
- Obesity80
- Aortic Valve Stenosis79
Leading sponsors
- Mayo Clinic94
- Assistance Publique - Hôpitaux de Paris91
- National Taiwan University Hospital74
- China National Center for Cardiovascular Diseases59
- Beijing Tiantan Hospital52
- Riphah International University51
- Second Affiliated Hospital, School of Medicine, Zhejiang University51
- Massachusetts General Hospital50
- Insel Gruppe AG, University Hospital Bern49
- Johns Hopkins University47
Where studies are running
- California465
- Alabama197
- Massachusetts182
- Arizona173
- New York162
- Florida144
- Maryland120
- Minnesota120
- Illinois118
- Texas118
Recruiting studies9,979 total
- NCT04252066Recruiting
Pregnancy and breastfeeding study for women with Fabry disease
This study follows pregnant and breastfeeding women with Fabry disease (and their infants) to better understand what happens during pregnancy and early life. You may or may not be taking migalastat, and the goal is to gather real-world information that could help future care.
Philadelphia, PennsylvaniaAges Any age - NCT04252950Recruiting
Exercise program after blood-flow procedures for leg artery disease
This study tests whether a community-based exercise program helps people recover and improve walking after a procedure to restore blood flow in the leg arteries. It may help if your main problem is leg circulation problems and you’re able to take part in exercise safely.
Minneapolis, MinnesotaAges 40–90 - NCT04255563Recruiting
Drug-coated balloon for coronary artery disease
This trial studies a balloon treatment coated with medicine (to help keep the artery open) for people with coronary artery disease. You may be a candidate if you are planned to receive this type of procedure and do not have certain key safety risks.
Nanjing, JiangsuAges 18 years+ - NCT04257994Recruiting
Study how heart cell connections differ in inherited rhythm problems
This study looks at how proteins that connect heart cells are distributed in people with inherited heart rhythm disorders (and some family members who may carry the gene). It aims to better understand the biology behind these conditions, which may help improve risk assessment and future care.
LondonAges 18 years+ - NCT04257487RecruitingPhase 3
Sulodexide to prevent blood clots from coming back
This study tests sulodexide (a blood-vessel protective medicine) to help stop deep leg blood clots or lung clots from returning after you’ve already been treated. It may help people with higher bleeding risk who are taking or recently finished standard anticoagulant medicines.
RozzanoAges 75 years+ - NCT04258488RecruitingPhase 4
Blood thinner pill vs warfarin after mechanical aortic valve
This study compares a blood thinner pill (a factor Xa inhibitor) with warfarin (vitamin K antagonist) in people who have had a mechanical aortic valve replacement. It looks at which option works better and is safer over the long term.
Bucheon-siAges 19 years+ - NCT04262492Recruiting
Registry of adults with APS on blood thinners
This study keeps an international registry of people with antiphospholipid syndrome (APS) who are taking direct oral blood thinners. It may help doctors better understand how APS patients do over time and improve future care, even if you’re not asked to change treatment.
NancyAges Any age - NCT04262830Recruiting
Heart scans to predict future heart failure after chemotherapy
This trial uses detailed heart imaging (a special MRI scan) to see how chemotherapy may have affected your heart and to predict who could develop heart failure later. If you qualify, it may help your care team better monitor your heart health over time.
San Diego, CaliforniaAges 13–39 - NCT04263038RecruitingPhase 4
Watchful waiting versus blood thinners for small lung clots
This trial compares close monitoring (“watch and wait”) versus taking the blood thinner rivaroxaban in people with a small type of lung blood clot. It aims to find out whether low-risk patients can safely avoid or reduce anticoagulation while still staying healthy.
Woluwe-Saint-Lambert, Brussels CapitalAges 18 years+ - NCT04265040Recruiting
Heart muscle disease registry for non-ischemic conditions
This trial is a registry, meaning it collects health information to help doctors study heart muscle diseases and plan future cardiovascular studies. You may be able to join if you have a non-ischemic cardiomyopathy such as dilated cardiomyopathy, certain forms of thick heart muscle, non-compaction, or arrhythmogenic right-sided disease.
Heidelberg, Baden-WurttembergAges 18–80 - NCT04267159Recruiting
Treatment plan for sudden irregular heartbeat in the ER
This trial looks at how to manage a new, sudden irregular heartbeat (atrial fibrillation or atrial flutter) when you first arrive in the emergency room. It may help by testing an “elective” approach to rhythm control, depending on your heart rate and overall safety factors.
Jyväskylä, Central FinlandAges Any age - NCT04268199RecruitingPhase 2
At-home chemotherapy teaching for people with myeloma
This study tests whether people with symptomatic myeloma can safely learn to give themselves chemotherapy at home. It aims to make treatment easier while tracking safety and whether treatment is done correctly.
Calgary, AlbertaAges 18 years+ - NCT04271033Recruiting
MicroNet-covered stent to prevent stroke in carotid procedures
This study tests a special stent (a small mesh tube) that may help prevent stroke during a carotid revascularization procedure. It’s for people with narrowing in the carotid artery, either recently symptomatic or very high-grade even without symptoms.
Krakow, MaloplskaAges 18 years+ - NCT04271644RecruitingPhase 1/Phase 2
CAR-T treatment targeting BCMA for hard-to-treat myeloma
This Phase 1/2 study tests a BCMA-targeting CAR-T cell therapy for people with relapsed or refractory multiple myeloma or related plasma cell diseases. It may help by using your own immune cells, engineered to recognize a specific target on cancer cells.
Kunming, YunnanAges 18–75 - NCT04273607RecruitingPhase 2/Phase 3
Test an ECMO approach without blood thinners for lung failure
This trial studies whether people on a breathing machine called VV-ECMO can be managed without routine blood thinners, to reduce bleeding risk. It is meant for adults with severe lung failure (ARDS) and checks that it is safe for you to avoid anticoagulation.
Toronto, OntarioAges 18 years+ - NCT04275726Recruiting
Myval heart valve study for adults needing TAVI
This trial studies whether the Myval THV (a new heart valve) is safe and effective for adults who need TAVI, a procedure to replace a narrowed heart valve without open-heart surgery. You may be considered if a heart team says you’re a good candidate for this valve procedure and you’re willing to join the study.
MinskAges 18 years+ - NCT04281329Recruiting
CT and heart MRI add-on for atrial fibrillation ablation
This trial studies whether CT scans and heart MRI scans (done around the time of atrial fibrillation ablation) can help care planning and results. It may help your team better understand your heart before and after the procedure.
ParisAges 18 years+ - NCT04281823Recruiting
MRI heart scan study for people with heart conditions
This study looks at heart problems using a special MRI scan called a cardiovascular magnetic resonance (CMR) scan. It may help doctors learn more about how to assess and understand cardiovascular disease using detailed heart images.
Houston, TexasAges Any age - NCT04282629RecruitingPhase 2
Milrinone to help prevent brain blood-flow complications after aneurysm bleed
This Phase 2 trial tests whether milrinone, a heart-acting medicine, can improve brain blood flow to help prevent delayed brain ischemia after a severe subarachnoid hemorrhage. It may help reduce later brain damage in people who are too ill or sedated for a normal neurologic exam early on.
BordeauxAges 18 years+ - NCT04286516Recruiting
Brain and robot training for arm movement after stroke
This study tests whether brain stimulation and robotic/arm training can improve arm movement in people who had a stroke. It may help strengthen movement and coordination by targeting brain pathways related to arm control.
Pittsburgh, PennsylvaniaAges 45–90 - NCT04286399RecruitingPhase 4
Prevention trial for heart outcomes in people with type 2 diabetes
This Phase 4 trial studies an approach to help prevent heart problems in adults with type 2 diabetes who are at higher heart risk. It may help reduce future cardiovascular events by testing medications for safety and benefit in this group.
SingaporeAges 40 years+ - NCT04293471Recruiting
Echocardiogram test to predict outcomes in CRT patients
This trial looks at how well an echocardiogram (ultrasound of the heart) can predict outcomes for people with left bundle branch block who already have cardiac resynchronisation therapy (CRT). If you qualify, your heart scans may be used to better estimate risk and guide care.
Tromsø, TromsAges 18–100 - NCT04295486RecruitingPhase 2
Low-dose aspirin to prevent blood clots after hip or knee surgery
This Phase 2 study tests the best dose of low-dose aspirin to help prevent dangerous blood clots after total hip or knee replacement surgery. If you’re at lower clot risk and can safely take aspirin, it may help reduce clot risk while you recover.
Miami, FloridaAges 19 years+ - NCT04295252Recruiting
Altshock-2 registry for people with cardiogenic shock
This study is a “registry,” meaning it collects health information from people hospitalized with cardiogenic shock. It may help doctors better understand the condition and improve care over time.
MilanAges 18 years+
Common questions
- How many heart & circulation clinical trials are recruiting?
- Clin2 is tracking 9,982 recruiting cardiology studies from the U.S. registry right now, out of 15,268 we cover in this area in total.
- What does “Heart & circulation” cover here?
- Heart disease, blood pressure, and disorders of the blood vessels and circulation. We group each study into heart & circulation based on the conditions it studies, so you can scan the whole therapeutic area at once and drill into a specific condition.
- How do I find a heart & circulation trial near me?
- Use the search to filter heart & circulation studies by location and eligibility. Every Clin2 trial page explains the criteria in plain English and offers a short, optional pre-screen for a fit read — the study team makes the final decision.
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Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov; specialty groupings are derived from each study’s conditions. Talk with your doctor about whether a specific trial is right for you.