Cardiology
Heart & circulation clinical trials
Heart disease, blood pressure, and disorders of the blood vessels and circulation. We’re tracking 10,062 recruiting studies in this area right now.
By phase
- Not applicable8,033
- Phase 2488
- Phase 4482
- Phase 3452
- Phase 1360
- Phase 1/Phase 2161
- Phase 2/Phase 386
Top conditions
- Stroke856
- Heart Failure567
- Hypertension402
- Cardiovascular Diseases390
- Coronary Artery Disease373
- Multiple Myeloma329
- Atrial Fibrillation273
- Ischemic Stroke199
- Atrial Fibrillation (AF)146
- Acute Ischemic Stroke141
- Pulmonary Hypertension103
- Myocardial Infarction98
- Congenital Heart Disease86
- Peripheral Arterial Disease85
- Stroke, Ischemic84
- Acute Coronary Syndrome82
- Obesity80
- Aortic Valve Stenosis78
Leading sponsors
- Mayo Clinic95
- Assistance Publique - Hôpitaux de Paris92
- National Taiwan University Hospital74
- China National Center for Cardiovascular Diseases59
- Beijing Tiantan Hospital53
- Massachusetts General Hospital51
- Riphah International University51
- Second Affiliated Hospital, School of Medicine, Zhejiang University51
- Insel Gruppe AG, University Hospital Bern50
- Johns Hopkins University47
Where studies are running
- California466
- Alabama199
- Massachusetts182
- Arizona176
- New York166
- Florida145
- Illinois120
- Maryland120
- Minnesota120
- Texas120
Recruiting studies10,059 total
- NCT01730092Recruiting
Study of blood and imaging biomarkers in pulmonary artery hypertension
This study tracks natural changes in “biomarkers” (measurable signals in blood) and imaging findings in people with pulmonary arterial hypertension (PAH) or suspected PAH. It also includes healthy people for comparison, helping researchers understand what these signals mean over time.
Bethesda, MarylandAges 18–100 - NCT01137643Recruiting
Sharing blood and tissue samples for blood cancer research
This trial collects tissue, blood, and other body fluid samples from people with blood-related cancers. The goal is to help researchers study these diseases by building a source of samples for future testing.
Chapel Hill, North CarolinaAges 18–120 - NCT00985049Recruiting
Study genes from blood flow fluid during aortic valve surgery
This study looks at gene activity in the heart to better understand what is happening during aortic valve surgery. It may help researchers find ways to monitor or improve heart care in the future.
Boston, MassachusettsAges 20 years+ - NCT01132885Recruiting
Brain scans in children with Williams syndrome
This study uses brain testing—often MRI scans—to learn how the brains of children with Williams syndrome are different from typical development. It may help researchers better describe brain patterns and improve future care for people with Williams syndrome.
Bethesda, MarylandAges 5 years+ - NCT01143480Recruiting
Testing how the body responds to endotoxin
This study checks how your immune system (your body’s defense system) reacts to a controlled substance that triggers inflammation. It may help researchers understand why some people have stronger or weaker inflammatory responses.
Research Triangle Park, North CarolinaAges 18–100 - NCT01218776Recruiting
Survey study for people with acute heart symptoms
This study is an international survey about acute coronary syndromes, which are sudden signs of heart-related problems. Your answers can help researchers better understand symptoms and care needs after these events.
Bologna, Emilia-RomagnaAges 18 years+ - NCT01347216Recruiting
COMPERA study for lung vessel pressure medicines
This study follows people with different types of high blood pressure in the lungs (pulmonary hypertension) to see how starting specific lung blood vessel medicines affects outcomes. It may help improve how clinicians choose and monitor treatment over time.
LeuvenAges 1 week+ - NCT01904851Recruiting
Registry for leg artery procedures and their outcomes
This study collects information about people who had a procedure to improve blood flow in certain leg arteries. It helps researchers understand which treatments work best and what outcomes to expect.
Little Rock, ArkansasAges Any age - NCT01761981Recruiting
Registry for patients with hereditary bleeding vessel disease (HHT)
This is a patient registry that collects information about people with hereditary hemorrhagic telangiectasia (HHT). It may help doctors better understand the condition and improve care over time.
Buenos Aires, Buenos AiresAges Any age - NCT01524211Recruiting
Stent grafts for treating aortic aneurysms and dissections
This trial studies a special stent-graft placed inside the aorta to treat aneurysms, penetrating ulcers, or chronic dissections. It aims to see how well these branch stent grafts fit and seal the problem area while reducing the need for open surgery.
Boca Raton, FloridaAges 18 years+ - NCT01653223Recruiting
Simvastatin to protect the heart during heart surgery
This trial looks at whether simvastatin (a cholesterol medicine) can help protect the heart during cardiac surgery. You might be invited if you’re having surgery for certain, non-complex heart conditions, but not if you have some specific related health problems.
Guangzhou, GuangdongAges 18 years+ - NCT01732523Recruiting
Check if extra blood-vessel growth predicts stroke risk in carotid narrowing
This study looks at an imaging test to see whether signs of new blood-vessel growth in an artery predict future stroke risk in people who have carotid artery narrowing but no symptoms. If it works, it could help doctors identify who may need closer monitoring or preventive treatment.
BaselAges 18 years+ - NCT02012699Recruiting
Cancer registry for people with or at risk of cancer
This trial collects health information and samples (a “cancer repository”) to help researchers study cancer and cancer risk. You may be able to join if you’ve had cancer before or if you’re at higher risk or have concerning findings.
Greenwood Village, ColoradoAges 19–110 - NCT02043691Recruiting
Testing specialized grafts to repair complex aortic problems
This trial studies different custom and modified stent-grafts (tiny metal-reinforced tubes placed inside the aorta) to repair difficult aortic aneurysms and dissections. It aims to see which approach best fits your aortic shape and helps keep blood flowing safely.
Birmingham, AlabamaAges 18 years+ - NCT02098265Recruiting
Brain-signal device for stroke arm rehabilitation
This study tests a device that uses brain activity signals to trigger stroke arm therapy. It may help improve how well your upper arm and hand function by timing the training to your brain’s patterns.
Madison, WisconsinAges 18 years+ - NCT02852031Recruiting
Care program for newborns needing the Norwood procedure
This trial focuses on improving care for babies born with certain complex heart conditions where only one pumping chamber works. It is meant for babies (including unborn babies) who are planned to have the Norwood procedure, which is a common early surgery.
Birmingham, AlabamaAges Up to 1.3 years - NCT02650453Recruiting
Registry for surgeries to restore blocked deep leg veins
This study keeps a registry (a secure list of patient information) for people who have major blockages in deep veins in the leg or pelvis and need a vein repair procedure. It may help doctors understand outcomes over time and improve future care.
MaastrichtAges Any age - NCT02879071Recruiting
Follow-up after blocking abnormal brain blood vessels
This study checks people long-term after a procedure called embolization, which blocks abnormal blood vessel connections in the brain (arteriovenous malformations). It may help doctors learn how well the treatment lasts over time and what outcomes to expect.
ParisAges 18 years+ - NCT02208388Recruiting
CT scan test to guide treatment for blocked heart arteries
This trial studies a heart CT scan technique to help doctors better understand coronary artery blockages. It may help guide treatment choices for people with angina (chest pain) who are at intermediate to high risk.
Seoul, Songpa-GuAges 20 years+ - NCT02208869Recruiting
Registry for inherited high cholesterol (familial hypercholesterolemia)
This registry collects information from people with inherited high cholesterol to better understand the condition and care needs. You may be invited to share blood and medical test results, especially your cholesterol and related health history.
ChelyabinskAges 7–80 - NCT02399527Recruiting
Lymphatic problem registry for tracking outcomes
This study enrolls people with certain lymphatic (lymph fluid) conditions to collect information and track how they do over time. It may help doctors better understand outcomes and improve care.
Boston, MassachusettsAges Any age - NCT02180178Recruiting
Heart catheter registry for slow coronary blood flow
This study builds a database of people who are having a coronary angiography (a heart blood-vessel X-ray test). It aims to better understand conditions like slow blood flow in the heart’s small vessels and may help improve how these conditions are diagnosed and treated.
MainzAges Any age - NCT02818517Recruiting
Cardio-oncology checkup to understand heart side effects
This study looks at how cancer treatments may affect the heart (“cardiotoxicity”) and how patients are monitored and managed. You might benefit by getting close heart-related follow-up as part of the care plan.
Tel AvivAges 18 years+ - NCT02488876Recruiting
Banking heart tissue samples after cardiac surgery
This study collects tissue samples from people who are having heart surgery and stores them in a database to better understand the body’s inflammatory (immune) response after surgery. Your participation may help researchers learn why inflammation happens and how to improve care after surgery.
Aachen, North Rhine-WestphaliaAges Any age
Common questions
- How many heart & circulation clinical trials are recruiting?
- Clin2 is tracking 10,062 recruiting cardiology studies from the U.S. registry right now, out of 15,523 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.
Other specialties
- Cancer
- Brain & nervous system
- Hormones & metabolism
- Mental health
- Digestive system
- Lungs & breathing
- Immune system & allergy
- Women’s health & pregnancy
- Skin
- Blood & lymphatic
- Kidney & urinary
- Infections
- Genetic & congenital
- Bones, joints & muscles
- Pain
- Injuries & trauma
- Mouth & dental
- Eyes & vision
- Ear, nose & throat
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.