Cardiology
Heart & circulation clinical trials
Heart disease, blood pressure, and disorders of the blood vessels and circulation. We’re tracking 9,989 recruiting studies in this area right now.
By phase
- Not applicable7,969
- Phase 2481
- Phase 4481
- Phase 3447
- Phase 1361
- Phase 1/Phase 2163
- Phase 2/Phase 387
Top conditions
- Stroke845
- Heart Failure564
- 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
- California466
- Alabama197
- Massachusetts182
- Arizona173
- New York162
- Florida144
- Maryland120
- Minnesota120
- Illinois119
- Texas118
Recruiting studies9,986 total
- NCT04975646Recruiting
Goal-setting tool for upper-arm spasticity treatment
This study looks at whether a structured goal-setting approach helps measure and improve treatment for stiff, tight upper-arm muscles after a stroke. It tests how well patients’ (or caregivers’) goals can be tracked when receiving or considering botulinum toxin (BTX-A).
LjubljanaAges 18 years+ - NCT04976036RecruitingPhase 2
Nintedanib to reduce nosebleeds in adults with HHT
This trial tests whether nintedanib can reduce how often and how severe nosebleeds are in adults with hereditary hemorrhagic telangiectasia (HHT). It may help by calming blood-vessel problems that cause bleeding.
BronAges 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+ - NCT04981184Recruiting
Testing muscle signals to predict walking recovery after stroke
This study looks at surface muscle electrical signals (from electrodes on the skin) to understand and predict how well your balance and walking may improve after a first stroke. You might benefit by learning more about your recovery and by helping researchers find better ways to track progress.
KaunasAges 18–89 - NCT04982419RecruitingPhase 2/Phase 3
Remote arm treatment to protect heart and kidneys in heart failure
This trial tests whether a simple “arm cuff” treatment done before a heart artery procedure can help protect the kidneys and the heart in people with congestive heart failure. If it works, it may lower the chance of kidney injury around the time of the scan/stent procedure.
Pittsburgh, PennsylvaniaAges 18 years+ - NCT04983823Recruiting
Study aims to improve long-term heart effects after COVID
This trial looks at how persistent heart-related changes after a past COVID infection may be affected by study treatments. It mainly seeks people who are stable enough for follow-up visits and heart imaging, and who are not already on the specific heart medications required.
Melbourne, VictoriaAges 50–85 - NCT04986332Recruiting
Program for COPD or heart failure in people with other illnesses
This trial studies a detailed, whole-body program to improve outcomes in people with COPD or heart failure, especially those who also have several other chronic conditions. It may help by improving activity and monitoring health markers over about 24 weeks.
PalermoAges 45–75 - NCT04988685Recruiting
Heart artery balloon treatment registry study for adults
This study follows adults with blocked heart arteries who are treated using a special type of balloon (drug-coated balloon) during a procedure. It aims to track real-world outcomes to better understand how well this treatment works for people with new blockages or previously treated vessel narrowing.
Lucerne, Canton of LucerneAges 18 years+ - NCT04988555RecruitingPhase 1/Phase 2
Study of an investigational drug for high-risk acute leukemia
This Phase 1/2 study tests enzomenib (DSP-5336) in people with relapsed or hard-to-treat acute leukemia (and, in some places, certain other blood cancers). The goal is to see how the drug works and how safe it is, especially for leukemia cases with specific genetic changes (KMT2A/MLL or NPM1).
Newport Beach, CaliforniaAges 12 years+ - NCT04988672Recruiting
Tracking outcomes after heart attacks to improve care
This study follows people after an acute heart attack (AMI) to learn what care is used and what outcomes happen over time. Your information may help doctors optimize how heart attack care is delivered in the future.
LucerneAges 18 years+ - NCT04990297Recruiting
MRI test to better predict risk in dilated heart muscle
This trial uses a heart MRI to measure details in people with dilated cardiomyopathy and reduced pumping strength. It aims to use these MRI findings to better predict your future heart risk and guide care.
Beijing, Beijing MunicipalityAges Any age - NCT04991103RecruitingPhase 2
Testing delaying stem cell transplant after early myeloma response
This Phase 2 study tests whether people with newly diagnosed multiple myeloma can safely delay or avoid an immediate stem cell transplant if they respond well to early treatment. It aims to see if this “response-adapted” approach can still control the disease while reducing the need for upfront transplant for some patients.
Birmingham, AlabamaAges 18 years+ - NCT04992923Recruiting
Study of people with confirmed heart valve infection
This is an observational study that follows people with confirmed infective endocarditis (a serious infection of the heart lining or heart valves). It may help doctors better understand the illness and improve care.
ParisAges 18 years+ - NCT04993612Recruiting
Blood test during heart procedure from a wedge position
This study checks whether measuring blood gases from a specific heart “wedge” position during a right heart catheter test gives useful information. It may help doctors understand how blood and oxygen are doing in certain heart and lung conditions.
AachenAges 18–99 - NCT04994756Recruiting
Stroke and brain blood-vessel procedure registry study
This study collects information from people who undergo a procedure for a problem in brain or blood vessels (such as stroke-related vessel blockage). It does not test a new drug; it helps doctors understand outcomes and care patterns after these procedures.
Birmingham, AlabamaAges 1–120 - NCT04997824Recruiting
AI-guided selection for atrial fibrillation ablation
This trial tests whether an artificial intelligence (AI) system can help choose the best patients for a procedure called catheter ablation for atrial fibrillation (AF). It may improve which people benefit most while keeping safety in mind.
SeoulAges Any age - NCT04998357Recruiting
Autologous mitochondrial transplant after acute stroke complications
This trial studies whether giving your own mitochondria (cell energy parts) can improve recovery after certain emergencies in the brain, such as blocked brain blood vessels or dangerous vessel spasm after a brain bleed. You might be considered if you can safely receive standard procedures and also get a brain MRI.
Seattle, WashingtonAges 18–85 - NCT05000515Recruiting
Breathing muscle training to lower blood pressure in postmenopause
This study compares a breathing-based exercise program with regular aerobic exercise to help lower blood pressure and improve blood vessel function in postmenopausal women. It’s mainly for people with mildly elevated resting blood pressure who are not already doing very intense workouts.
Boulder, ColoradoAges 50 years+ - NCT05000996Recruiting
Gut microbiome study for people having metabolic surgery
This study looks at your gut bacteria (your “microbiome”) around the time of metabolic surgery. It may help researchers understand how surgery affects gut health and related conditions like diabetes, blood pressure, and cholesterol.
Nashville, TennesseeAges 21–65 - NCT05002543Recruiting
Real-world study of heart valve repair devices for multiple valves
This study checks how well and how safely CORCYM valve devices work in real-world patients with heart valve problems in the aortic, mitral, and/or tricuspid positions. It may help doctors understand expected outcomes outside of tightly controlled research settings.
Indianapolis, IndianaAges Any age - NCT05001087Recruiting
Patient and doctor registry for active multiple myeloma
This study creates a real-world registry (a group database) of people with active, symptomatic multiple myeloma. It helps researchers learn from patients and doctors over time and may support future research and treatment improvements.
Florence, FirenzeAges 18 years+ - NCT05004051Recruiting
Monitoring before and after aortic aneurysm endovascular repair
This registry study tracks how patients do before and after an endovascular procedure to repair an abdominal aortic aneurysm. It also looks at how aneurysms are measured over time, which may help improve follow-up care.
Birmingham, AlabamaAges 18 years+ - NCT05004233Recruiting
Antiplatelet treatment imaging test for stroke patients
This study uses special microscope imaging (transmission electron microscopy) to look at tiny changes in platelets before and after starting an antiplatelet medicine. It’s testing whether platelets show clear structural signs around the start of treatment for a specific type of stroke.
Saint-EtienneAges 18 years+
Common questions
- How many heart & circulation clinical trials are recruiting?
- Clin2 is tracking 9,989 recruiting cardiology studies from the U.S. registry right now, out of 15,300 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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- Mental health
- Digestive system
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- Immune system & allergy
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- 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.