Cardiology
Heart & circulation clinical trials
Heart disease, blood pressure, and disorders of the blood vessels and circulation. We’re tracking 9,973 recruiting studies in this area right now.
By phase
- Not applicable7,957
- Phase 2481
- Phase 4480
- Phase 3447
- Phase 1360
- Phase 1/Phase 2162
- Phase 2/Phase 386
Top conditions
- Stroke843
- Heart Failure565
- Hypertension399
- Cardiovascular Diseases390
- Coronary Artery Disease373
- Multiple Myeloma333
- Atrial Fibrillation268
- Ischemic Stroke200
- Atrial Fibrillation (AF)140
- Acute Ischemic Stroke138
- Myocardial Infarction101
- Pulmonary Hypertension100
- Stroke, Ischemic86
- Congenital Heart Disease85
- 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
- California461
- Alabama197
- Massachusetts183
- Arizona173
- New York161
- Florida145
- Maryland120
- Minnesota120
- Illinois119
- Texas118
Recruiting studies9,970 total
- NCT07513974Recruiting
Pain sensitivity test to predict opioid needs in heart surgery
This study measures how sensitive you are to pain using a special device, then tracks how much pain medication you need during heart surgery. The goal is to see if pain sensitivity can predict opioid requirements and help doctors customize pain control for you.
Brussels, AnderlechtAges Any age - NCT06142474RecruitingPhase 3
SGLT2 inhibitors for heart failure patients during ventilator weaning
This trial tests a heart failure medication (SGLT2 inhibitor) to help people with heart failure who are on a breathing machine (ventilator) get better and come off the machine faster. It is for patients with a specific type of heart failure where the heart pumps weakly (EF ≤ 40%).
TaipeiAges 20 years+ - NCT06739005Recruiting
AI model to assess heart surgeon technique in bypass surgery
This study tests whether an artificial intelligence (AI) model can accurately evaluate the surgical technique of heart surgeons performing a common bypass procedure. If you are a first-time bypass patient and do not have certain heart or organ conditions, you may be able to participate and help improve surgical training tools.
Beijing, Beijing MunicipalityAges 18 years+ - NCT04792320Recruiting
Probiotics and fiber for kidney disease with leg artery blockage
This study tests whether an oral absorbent plus probiotics can improve gut health and circulation in people who have chronic kidney disease and symptomatic peripheral artery disease (PAD). It will also track changes in blood markers and how well blood vessels function.
TaipeiAges 20 years+ - NCT04788914Recruiting
Test saliva or blood markers to track kidney and leg disease treatment
This study looks at a gene marker (“lncRNA,” a natural molecule in the body) to see how well an oral absorbent, with or without probiotics, is helping people with chronic kidney disease (CKD) who also have blocked leg arteries. It may help doctors better measure treatment impact and tailor care.
Taipei, TaiwanAges 20 years+ - NCT06964035Enrolling by invitation
How original valve problem affects new valve's long-term health
This study looks at how the original problem with your aortic valve (narrowing, leaking, or both) might affect how long the replacement valve stays healthy. If you had both your aortic and mitral valves replaced, doctors want to track how well the new valve works over time.
Maastricht, MaastrichtAges 18 years+ - NCT07696533Recruiting
Comparing two imaging tests for chronic coronary syndrome
This trial sees if a carotid ultrasound is as good as a CT calcium score to detect heart disease in people with chest pain. It may help avoid more expensive or less available scans.
HarrowAges 18 years+ - NCT05525663Recruiting
Rehab for older adults after heart failure with strong pumping
This trial studies whether a physical rehabilitation program helps older adults recover and function better after a recent hospital stay for heart failure when the heart’s pumping strength is preserved. It may help you regain walking ability and daily independence after your episode.
Winston-Salem, North CarolinaAges 60 years+ - NCT06764966RecruitingPhase 2
Statin and beta blocker study for liver disease
This trial tests if adding a statin to beta blocker treatment helps people with advanced liver disease (cirrhosis) who have had complications like fluid buildup, confusion, or bleeding. It is for patients who are already taking a non-selective beta blocker and will be followed for 12 months.
Charleston, West VirginiaAges 18 years+ - NCT07636343Recruiting
Eccentric Training for Heart Failure Recovery
This trial tests a special type of strength training (eccentric exercise, where muscles lengthen under load) for people with heart failure who have reduced pumping ability. The goal is to improve your exercise capacity and heart function safely.
EdegemAges Any age - NCT06715748RecruitingPhase 4
Ketone drink study for cyclists after hard exercise
This study tests if taking a ketone drink before intense cycling helps your heart recover faster afterwards. It's for healthy recreational cyclists who are very fit for their age and sex.
Hasselt, LimburgAges 18–50 - NCT07505199RecruitingPhase 1
Immune cell therapy for advanced heart failure from blocked arteries
This early-phase study tests a new type of immune cell therapy (CAR-DC) for people with advanced heart failure due to blocked arteries. It aims to see if the treatment is safe and may help improve heart function.
Hangzhou, Zhejiang / 浙江Ages 18–75 - NCT07518030Recruiting
Telemedicine support for heart failure medication adjustment
This study tests whether remote check-ins via phone or video can help safely increase heart failure medications to target doses. You'll use a device to share weight, blood pressure, and heart rate with your doctor, who will adjust your medicines based on how you're doing.
PiacenzaAges 18 years+ - NCT07683299Recruiting
New heart monitoring during bypass surgery
This study tests a new way to monitor your heart and blood flow during heart surgery that uses a heart-lung machine. The goal is to see if this integrated approach helps doctors make better decisions during the operation.
Medellín, AntioquiaAges 18 years+ - NCT07684885Recruiting
Blood pressure study for newborns and children
This study tests a new non-invasive blood pressure device in babies, children, and teens. It compares the device's readings to those from an arterial line, which is already in place for their medical care. The goal is to see if the device can measure blood pressure accurately without needles.
HelsinkiAges Up to 18 years - NCT06886529Recruiting
Patient and family involvement in cardiology care at SickKids
This study looks at how patients and families can be more involved in care for children admitted to the cardiology unit at SickKids. It may help improve how the hospital works with families.
TorontoAges Up to 18 years - NCT06105866Enrolling by invitation
How preoperative fasting affects heart function
This study looks at how the heart's right chamber works in patients who have fasted before surgery. Researchers use an ultrasound test to measure a specific heart function and want to see if not drinking fluids or taking sedatives before surgery changes it.
Aydin, ZaferAges 18–75 - NCT05678530Recruiting
Study uses routine exercise test to check fitness measuring methods
This observational study does not change your treatment. It collects results from your usual cardiopulmonary exercise test (CPET) to help validate better ways to estimate VO2max, a measure of exercise capacity.
Scottsdale, ArizonaAges 18 years+ - NCT05714241Recruiting
Blood tests to study heart pain with blocked-unblocked arteries
This study looks at blood “biomarkers” and platelet function to better understand INOCA (heart-related chest pain despite no major artery blockage). You may be eligible if you have INOCA and are already taking aspirin, and if you haven’t taken certain blood-thinner or platelet-altering medicines recently.
RomeAges 18 years+ - NCT07679009Enrolling by invitation
Cardiac MRI for people with pacemakers or ICDs
This trial uses cardiac MRI to check the heart in people who have older or damaged pacemaker leads or who have permanent leads on the outside of the heart. The goal is to see if MRI can safely provide useful images without causing problems.
Dallas, TexasAges 18 years+ - NCT06109155RecruitingPhase 4
Comparing medications to reduce bleeding in heart surgery
This trial tests two medicines—ACT (a blood thinner) and tranexamic acid (a medicine to reduce bleeding)—to see which is better at controlling bleeding during heart surgery. It is for adults having planned heart surgery with a heart-lung machine.
TaichungAges 18 years+ - NCT07519733Recruiting
Exercise Testing Before High-Risk Surgery
This study tests whether a simple exercise test before surgery can help doctors better predict and prevent complications in older adults undergoing major operations. You'll do a gentle exercise test on a stationary bike or treadmill to measure your fitness level.
New Haven, ConnecticutAges 45 years+ - NCT06977477Recruiting
Managing fluid buildup in heart failure patients
This study tests a new way to manage fluid buildup in patients with a specific type of heart failure (HFpEF) who are in the hospital. It aims to improve how doctors remove excess fluid and help you feel better.
Magdeburg, Saxony-AnhaltAges 18 years+ - NCT07489417Recruiting
Sleep and blood pressure study
This study looks at how a short night of sleep affects your blood pressure when you are under stress. It compares people with a healthy weight to those with obesity to see if sleep loss has different effects.
Columbia, MissouriAges 18–45
Common questions
- How many heart & circulation clinical trials are recruiting?
- Clin2 is tracking 9,973 recruiting cardiology studies from the U.S. registry right now, out of 15,205 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.