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
- NCT03203239Recruiting
Red light treatment for circulation problems in leg arteries
This study tests whether a red-light therapy can improve symptoms or function in people with peripheral artery disease (poor blood flow to the legs). You may qualify if your leg circulation test is abnormal and you can safely take part in the study.
Milwaukee, WisconsinAges 18–85 - NCT02986087Recruiting
FETO balloon procedure for severe congenital diaphragmatic hernia
This trial studies a fetal procedure called FETO (placing a small balloon in the baby’s windpipe) to help severe congenital diaphragmatic hernia babies develop better lungs before birth. It may help some babies whose scans suggest very limited lung growth, but it requires specific timing and pregnancy conditions.
Cincinnati, OhioAges 18–50 - NCT02932007RecruitingPhase 2
Chloroquine to treat ongoing atrial fibrillation symptoms
This trial tests whether chloroquine can reduce symptoms in people with persistent atrial fibrillation (AF), an irregular heartbeat that lasts longer than a week. It will also closely monitor heart rhythm and safety, since the medicine can affect the heart and other organs.
Tampa, FloridaAges 18 years+ - NCT03171012Recruiting
Exercise rehab with added movement retraining after stroke
This trial tests whether adding a specific movement-retraining method (proprioceptive neuromuscular facilitation) to heart-and-lung style exercise improves recovery after stroke. It focuses on people who still have one-sided weakness and can already walk a short distance.
Recife, PernambucoAges 21–65 - NCT03180320Recruiting
Exercise program for chronic heart failure with confidence building
This trial studies whether a specific gentle exercise routine (Baduanjin, “eight-silken-movement”) plus skills to build self-confidence can help people with chronic heart failure. It’s meant for people who are stable and can do prescribed exercise testing and sessions.
Guangzhou, GuangdongAges 18 years+ - NCT02947750RecruitingPhase 2
Exercise study in people with kidney disease
This Phase 2 study tests how engaging in supervised exercise affects the body’s blood-vessel responses in people with chronic kidney disease (CKD) who don’t exercise regularly. It may help researchers understand whether exercise could be beneficial for CKD-related health changes.
Atlanta, GeorgiaAges 18–75 - NCT03142074Recruiting
Study of how tissue works in enlarged aortic vessels
This study looks at the tissue “structure and strength” in people with a bulging (aneurysm) in the upper part of the aorta, either before symptoms or during emergency surgery. Your tissue samples help researchers understand why these aneurysms happen and how they may behave over time.
Leuven, Vlaams BrabantAges 18 years+ - NCT03362164Recruiting
Studying heart involvement in people with Fabry disease
This study looks at how the heart is affected in adults with Fabry disease. It may help doctors better understand heart-related changes in order to guide care.
Würzburg, BavariaAges 18 years+ - NCT03272620Recruiting
Emergency atrial fibrillation patients invited to study
This study includes people who have atrial fibrillation and are seen in the emergency department. It aims to learn from emergency care and may help improve how atrial fibrillation is managed in the ER.
ViennaAges 18 years+ - NCT03065413Recruiting
Study of heart health, habits, and mood in sailors
This study looks at how common heart and blood vessel problems are, and how changes in activity, diet, and anxiety or depression show up over time in naval personnel. It may help improve understanding of risk factors and mental well-being in this group.
Athens, AthensAges 18 years+ - NCT03168659Recruiting
Study of HeartLight during catheter ablation for irregular heartbeat
This study looks at the HeartLight device during a procedure to treat atrial fibrillation (an irregular heart rhythm) that comes and goes. It is meant for adults whose symptoms continue even after trying at least one anti-arrhythmia medicine.
Tucson, ArizonaAges 18 years+ - NCT03378739Recruiting
Registry study for cardiogenic shock care at Inova
This study collects information about how cardiogenic shock is treated in the hospital at Inova (for sudden worsening heart failure or a heart attack). It may help improve care for future patients, because the research team will learn what treatments and outcomes are associated with different situations.
Falls Church, VirginiaAges 18–85 - NCT03041805Recruiting
Check whether a clot-risk score predicts recovery after vein surgery
This study looks at how well a clot-risk score (Caprini score) relates to blood clot checks and outcomes after varicose vein surgery. You may be asked to have an ultrasound scan a few weeks after your operation and be followed for about 4 weeks.
MoscowAges 18 years+ - NCT03355456Recruiting
Catheter ablation for atrial fibrillation with low-voltage mapping
This trial studies a catheter procedure that targets areas in the heart that show low electrical voltage to treat atrial fibrillation (an irregular heartbeat). You may be eligible if you have non-paroxysmal atrial fibrillation, have tried heart rhythm medicines, and your scan shows low-voltage areas in the left atrium.
Cleveland, OhioAges 18–85 - NCT03303612Recruiting
Check monitoring vs guided pacing after valve replacement
This study compares two ways to decide when someone needs a pacemaker after they get a new heart valve (TAVI) and develop a new, persistent left bundle branch block (LBBB). It may help reduce unnecessary procedures while still keeping heart rhythms safe.
Edmonton, AlbertaAges 18 years+ - NCT03357926Recruiting
Building predictions for atrial fibrillation in pacemaker patients
This study creates a database to better predict who with a pacemaker or ICD will develop atrial fibrillation (an irregular heart rhythm). It may help your care team spot risk earlier and tailor monitoring sooner.
GrazAges 18 years+ - NCT02939573RecruitingPhase 2
Study of medicines for skin-only vasculitis flares
This Phase 2 trial tests different medicines to calm active skin vasculitis and prevent flare-ups. It’s for people whose vasculitis mainly affects the skin, not major organs like kidneys or the brain.
Kansas City, KansasAges 18 years+ - NCT03008291Recruiting
Heart pacemaker study for slow heartbeats and heart failure
This trial tests how pacing from a specific part of the heart (a “bundle” pacing approach) can affect people with heart failure and/or slow heart rhythms. It may help certain patients whose heart rhythm is too slow or who need a pacemaker and related devices.
Rochester, MinnesotaAges 18 years+ - NCT02989948Recruiting
Custom stent graft for complex enlarged aorta
This trial tests a custom-made stent graft (a mesh tube placed inside the aorta) for people with a large, dangerous enlargement of the aorta that needs multiple branch vessels connected. It may help high-surgical-risk patients avoid open surgery, but it’s only for those who can’t use standard FDA-approved endovascular grafts.
New Haven, ConnecticutAges 50–95 - NCT03356392Recruiting
Registry for stroke patients getting clot-busting treatment
This study records information from adults with an acute ischemic stroke (a stroke caused by a blocked artery) who receive clot-busting medicine within 4.5 hours. It may help doctors better understand which patients benefit from treatment and how care decisions are made for certain blocked brain arteries.
Hamburg, Free and Hanseatic City of HamburgAges 18 years+ - NCT03011697Recruiting
Heart valve disease registry for adults
This study enrolls adults in the hospital with certain heart valve problems to track their health over time. It may help doctors better understand how valve disease behaves and what outcomes look like in real life.
Hangzhou, ZhejiangAges 18 years+ - NCT03161652RecruitingPhase 2
Levosulpiride for diabetic eye swelling and retinopathy
This Phase 2 study tests whether levosulpiride can improve changes in the retina in people with diabetic retinopathy and diabetic macular edema (eye swelling that can affect vision). It may help by targeting chemicals in the body that could affect eye tissue and inflammation.
Querétaro City, QuerétaroAges 40–69 - NCT03196414RecruitingPhase 1/Phase 2
CAR T cell therapy for relapsed myeloma with multiple targets
This trial tests an immune therapy made from T cells to attack multiple markers on multiple myeloma cells (including CD138 and BCMA). It may help people whose myeloma has come back or resisted treatment, when there are no curative options left.
Suzhou, JiangsuAges 18–75 - NCT07252856Recruiting
Digital support for heart rehab (phase III)
This trial tests a digital tool to help people with heart disease continue their cardiac rehabilitation at home during the maintenance phase. It's for people who have already completed the earlier rehab phase and are ready for long-term support.
LeuvenAges 18 years+
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.
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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.