Cardiology
Heart & circulation clinical trials
Heart disease, blood pressure, and disorders of the blood vessels and circulation. We’re tracking 9,984 recruiting studies in this area right now.
By phase
- Not applicable7,964
- 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
- California465
- Alabama197
- Massachusetts182
- Arizona173
- New York162
- Florida144
- Maryland120
- Minnesota120
- Illinois119
- Texas118
Recruiting studies9,981 total
- NCT04440254Recruiting
Long ECG monitoring for Fabry disease heart rhythm
This study checks how your heart’s electrical rhythm looks over a longer period using an ECG (a heart rhythm recording) in people with Fabry disease. It may help doctors understand heart rhythm changes better so future care can be more tailored and safer.
Paris, ParisAges 18 years+ - NCT04440761Recruiting
Registry for people with MINOCA heart-related chest pain
This is a research registry that collects information from people diagnosed with MINOCA (a specific type of heart-related injury). It may help researchers better understand causes and outcomes for this condition.
LondonAges 16 years+ - NCT04442100Recruiting
Testing a new easy-change heart valve replacement system
This study tests a biological (tissue) heart valve replacement system designed to be easier to change later. It may help people who need valve surgery because their valve is narrowed or damaged.
Tomsk, Tomsk OblastAges 60 years+ - NCT04442334Recruiting
European registry for people with fatty liver
This registry collects health and lifestyle information from adults with suspected or confirmed fatty liver (NAFLD) to help researchers better understand the condition. You may be asked about diet, exercise, alcohol intake, and some liver-related tests.
AntwerpAges 18–100 - NCT04442789Recruiting
Study of lasting effects after COVID-19 hospitalization
This study looks at what health problems remain after a person was hospitalized for COVID-19. It may help doctors understand these long-lasting effects and how to care for people afterward.
GiessenAges 18 years+ - NCT04444128Recruiting
Testing heart risk assessment using MRI T1 mapping
This study checks whether an MRI heart scan measure called “T1 mapping” can improve how doctors estimate heart disease risk in everyday people. You may join if you’re an adult and can have a contrast-enhanced heart MRI safely.
Frankfurt am Main, HesseAges 18 years+ - NCT04443439Recruiting
MRI study to assess stroke risk from carotid narrowing
This study looks at how dangerous carotid artery narrowing (blood vessels in the neck that supply the brain) might be, using CT and MRI information. It may help doctors better judge stroke risk for people with mild, moderate, or severe narrowing.
Xi'anAges Any age - NCT04443530Recruiting
Testing Ultimaster stents in everyday patient care
This trial looks at how safe and effective two specific stents are when doctors use them as part of routine care. You may be a candidate if you’re an adult receiving one of these Ultimaster stents and can follow the study check-in schedule.
ChuncheonAges 19 years+ - NCT04444349Recruiting
CoQ10 to reduce inflammation after heart surgery
This study tests whether CoQ10 (a natural nutrient) can lessen harmful inflammation and help protect organs after cardiovascular surgery. If you qualify, you may receive CoQ10 during the surgical period and be followed for how your body responds.
Beijing, Beijing MunicipalityAges 18–90 - NCT04445649Recruiting
Find factors to help people regain consciousness after brain injury
This study looks at what predicts recovery of consciousness after certain serious brain injuries, such as stroke or traumatic brain injury. It may help clinicians better identify which patients are more likely to wake up and guide early rehabilitation and care.
Hessisch OldendorfAges 18–85 - NCT04445909Recruiting
Continuous skin carbon dioxide monitoring in heart-lung bypass patients
This study checks whether a sensor placed on the skin can reliably measure carbon dioxide levels in people who need VA-ECMO, a kind of temporary heart-lung support. It aims to help doctors monitor breathing and circulation more accurately while you’re on this support.
ViennaAges 18–90 - NCT04446273Recruiting
Robotic therapy timing to improve arm movement after stroke
This trial studies whether giving robotic therapy to the shoulder and arm in a “priority” way (instead of focusing on the hand first) helps improve arm movement in people with chronic stroke. It may help by improving how your arm muscles and joints are trained to work together.
Taipei, TaipeiAges 20–75 - NCT04446585Recruiting
Study of early help for witnessed home cardiac arrests
This study looks at witnessed sudden cardiac arrest happening in residential areas, and tests whether a new first-responder approach gets help to people faster. It may help improve outcomes after cardiac arrest by improving the timing and coordination of emergency response.
Ballerup Municipality, The Capital RegionAges 8 years+ - NCT04448639Recruiting
Compare Takotsubo and heart attack during early heart scans
This trial looks at people with either a heart attack pattern called STEMI or a temporary heart condition called Takotsubo (stress-related heart weakness). It compares what is found during a planned heart artery scan (coronary angiography) within 12 hours, which may help doctors understand and manage these conditions sooner.
GothenburgAges Any age - NCT04449198RecruitingEarly Phase 1
Study for mitochondrial and blood-vessel issues in type 1 diabetes
This early study looks at how a new approach may affect energy-making (mitochondria) and blood-vessel signaling in people with insulin-dependent type 1 diabetes. It may help researchers understand whether these pathways can be improved in type 1 diabetes.
Augusta, GeorgiaAges 18 years+ - NCT04449666Recruiting
Brain scan and memory testing after bleeding from a brain aneurysm
This trial uses brain MRI scans and memory/brain-function tests in people who are recovering from a specific type of brain bleed (aneurysmal subarachnoid hemorrhage). It aims to understand how the brain’s memory area changes after the event and how that may relate to memory function during rehabilitation.
Hessisch OldendorfAges 18–70 - NCT04451551Recruiting
PET/CT scan study for reduced blood flow in the heart
This study uses a special PET/CT scan that shows how well blood reaches your heart muscle. It may help doctors better assess suspected or known reduced blood flow (ischemic heart disease).
Aarhus, Aarhus NAges 18 years+ - NCT04454177Recruiting
Smartwatch help to discharge earlier after valve replacement
This study tests whether using a smartwatch can safely help people leave the hospital earlier after a transcatheter aortic valve replacement (TAVR). It checks comfort, safety, and follow-up at home.
Hangzhou, ZhejiangAges 18 years+ - NCT04458883Recruiting
Cardiac MRI test in people with prior heart attack
This study uses special heart MRI scans to improve how heart images are made and interpreted. You may be asked to undergo MRI testing to help compare scans in people with a past heart attack and healthy volunteers.
Aberdeen, AberdeenshireAges 20 years+ - NCT04459806Recruiting
Study dose timing to improve care for brain injury
This trial studies how to time medication or treatment doses when a person has serious brain injury, using measurements from a pressure monitor in the skull. It may help doctors manage brain swelling and pressure more effectively.
Monza, MBAges 18–80 - NCT04460573RecruitingPhase 2
Using a smart boot to improve diabetic foot offloading
This trial studies whether a special “smart boot” can help people with diabetic foot ulcers rest (offload) the affected foot as they should. Better offloading may improve healing by reducing pressure on the wound.
Downey, CaliforniaAges 18 years+ - NCT04463316Recruiting
Clinic study for people with rare genetic conditions
This study is for people who have a rare syndrome or rare congenital condition and are seen at a rare-disease clinic. It aims to better understand these conditions and how care works in a team setting, which may help guide future treatment decisions.
Rotterdam, South HollandAges 18 years+ - NCT04464655Recruiting
10-minute heart MRI protocol for people with heart conditions
This study uses a short, 10-minute heart MRI to check how well it works for people who need a clinically indicated heart scan. It may help streamline heart MRI testing, making exams faster while still providing useful heart information.
Montreal, QuebecAges 18 years+ - NCT04467671RecruitingPhase 2
Tested new blood vessel graft for a heart surgery
This trial studies whether a newer “tissue-engineered” blood vessel graft is safe and works well in children who need a specific heart surgery connection outside the heart. It may help by offering a new type of graft, but your team will screen for size and medical factors first.
Columbus, OhioAges Any age
Common questions
- How many heart & circulation clinical trials are recruiting?
- Clin2 is tracking 9,984 recruiting cardiology studies from the U.S. registry right now, out of 15,291 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.