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
- NCT03367286Recruiting
Tests clot-mapping scans to predict recovery after stroke
This study compares two types of clot/brain-bleeding risk imaging scans to see which better predicts recovery in people with ischemic stroke. If you qualify and get the right timing and scan results, the trial may help doctors choose the best way to predict your prognosis.
HangzhouAges Any age - NCT03372980Recruiting
Study registry of blood tests for Takayasu arteritis
This study collects information and blood samples (biomarkers) to better understand Takayasu arteritis and how active it is. It may help researchers find tests that support diagnosis and track disease activity.
Beijing, Beijing MunicipalityAges 18–70 - NCT03374215Recruiting
Study hormone causes of high blood pressure in Black adults
This study looks at the body’s hormone signals to understand what causes primary aldosteronism (a condition that can lead to high blood pressure). By comparing clinical results and lab data, researchers hope to improve how the condition is diagnosed and managed, especially in Black participants.
Bethesda, MarylandAges 7–70 - NCT03376165Recruiting
Study heart rhythm problems after heart surgery
This trial looks at heart rhythm issues (especially atrial fibrillation) that can happen after certain heart procedures. It may help doctors better predict, prevent, or manage these rhythm problems after surgery.
LilleAges 18 years+ - NCT03378934RecruitingPhase 4
Berberine after stent placement to reduce blood-platelet effects
This trial studies whether berberine changes how strongly your platelets “stick together” after a coronary stent. It may help reduce risk related to clotting while you continue standard heart medicines (aspirin and clopidogrel).
Beijing, Beijing MunicipalityAges 18–70 - NCT03394313Recruiting
Registry study for people with new heart disease and type 2 diabetes
This study records health information to understand how type 2 diabetes and newly diagnosed heart disease affect people over time. It may help doctors learn what to watch for and how to plan care, though it is mainly an observational registry.
DohaAges 18 years+ - NCT03398369Recruiting
Imaging study to guide heart failure device treatment
This study uses advanced heart imaging to better understand heart function in people who may benefit from a cardiac resynchronization therapy (CRT) device. It aims to find ways to improve how doctors choose treatment and tailor care.
Charlottesville, VirginiaAges 20–90 - NCT03398850Recruiting
Study of coronary artery dissection cases in Brazil
This trial looks at patients who had a specific heart blood-vessel problem called spontaneous coronary artery dissection (SCAD). Doctors are reviewing confirmed cases to better understand how SCAD is identified in real-world patients.
São Paulo, São PauloAges Any age - NCT03399929Recruiting
Tracking long-term recovery after brain injury or stroke
This study looks at how people do over the long term after a stroke or a traumatic brain injury (brain injury from an accident). It may help researchers understand recovery and improve future support and care.
Encino, CaliforniaAges 18 years+ - NCT03397602Recruiting
Exercise program for long-term atrial fibrillation
This trial studies how an exercise training program affects people with persistent or permanent atrial fibrillation (an irregular heart rhythm). It may help improve how you feel and how well your heart and body handle activity.
London, OntarioAges 40 years+ - NCT03401762Recruiting
Wearable device training for stroke arm coordination
This trial tests a wearable device and training task to help improve how stroke-affected arm muscles work together. It may help reduce unwanted “extra muscle effort” and improve control in people with recent or long-term stroke.
Chicago, IllinoisAges 21 years+ - NCT03403686Recruiting
Study eye treatment target for diabetic retinopathy
This study tests a new approach aimed at improving diabetic eye disease (diabetic retinopathy). It may help by changing inflammation and related processes in the eye, especially in people who have diabetes and eye changes.
Birmingham, AlabamaAges 21–98 - NCT03403699Recruiting
Stem cell treatment for damaged eye blood vessels in diabetes
This study tests human iPSC–derived (lab-grown) cells aimed at repairing fragile, damaged blood vessels in diabetic retinopathy. It also involves eye exams and a small skin biopsy to support the research.
Birmingham, AlabamaAges 21–98 - NCT03409159Recruiting
Left atrial appendage closure registry in Austria
This study keeps records of people who already had a procedure to close a part of the heart called the left atrial appendage in Austria. It helps doctors understand outcomes and safety for patients after the procedure.
GrazAges 18 years+ - NCT03412435Recruiting
Heart attack registry study for patients diagnosed by angiography
This study is a registry, meaning it collects health information from people who are diagnosed with a heart attack. It may help doctors better understand heart attacks and improve care for future patients.
SeoulAges 19 years+ - NCT03416166Recruiting
Registry for people getting a heart valve procedure
This study collects information about people who are having a transcatheter tricuspid valve procedure (a heart valve treatment done through catheters rather than open-heart surgery). It may help doctors understand safety and outcomes better over time.
ZurichAges 18–99 - NCT03416413RecruitingPhase 4
Compare two treatments for varicose vein leakage
This trial tests whether foam sclerotherapy or a small-surgery treatment (ambulatory phlebectomy) works better for symptoms from leaking varicose veins. It may help by improving which option is most effective and comfortable for people like you.
LondonAges 18 years+ - NCT03418961RecruitingPhase 3
Study of heart-risk management for metastatic HER2 breast cancer
This trial follows people with metastatic HER2-positive breast cancer who are at higher risk for heart damage while on HER2-targeted therapy. Some participants are randomly assigned to different monitoring/heart-protection approaches to see what best helps keep the heart safe.
Anchorage, AlaskaAges 18 years+ - NCT03427996Recruiting
Study of rotational stent treatment in everyday care
This trial looks at how safe and effective rotational atherectomy (a procedure used to treat blocked heart arteries) is when used in routine clinical practice. It mainly gathers follow-up information from adults who already had this procedure.
Bucheon-siAges 19 years+ - NCT03428048Recruiting
NEXUS Registry for coronary artery disease or Afib patients
This is a research registry that collects health information about people with coronary artery disease or Afib. It may help doctors and researchers better understand these heart conditions and improve future care.
Glenwood Springs, ColoradoAges 18 years+ - NCT03445949RecruitingPhase 4
Best blood-thinner plan after a left heart device procedure
This trial compares which two medicines work best after a device closes off a part of the heart called the left atrial appendage. It may help reduce stroke risk while balancing bleeding risk after your procedure.
Warsaw, Masovian VoivodeshipAges 18 years+ - NCT03443999Recruiting
Registry to follow patients with a sirolimus stent
This study is a follow-up registry that tracks how people do after doctors place a specific type of drug-eluting coronary stent. It may help doctors understand safety and outcomes of the Supraflex stent in real-world care.
Breda, North BrabantAges 18 years+ - NCT03446287Recruiting
Surgery outcomes study for complex abdominal and chest aneurysms
This study follows people with complex aortic aneurysms who need open surgery instead of a less invasive procedure. It aims to understand treatment results and may help improve care for similar patients.
Rochester, MinnesotaAges 18 years+ - NCT03452202Recruiting
Brain stimulation to improve speech after stroke
This trial studies whether gentle brain stimulation (tDCS) can improve speech after a stroke. It focuses on people with stroke-related apraxia of speech while carefully checking hearing, brain function, and safety with devices or metal.
New York, New YorkAges 18–99
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.
Other specialties
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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.