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
- NCT04893564Recruiting
Testing blood DNA after 6 months of Waldenström treatment
This study looks at a blood test called circulating tumor DNA, measured after 6 months of treatment, to see how well it predicts outcomes in people with Waldenström macroglobulinemia. It may help doctors better judge who is responding and who may need treatment adjustments earlier.
AmiensAges 18 years+ - NCT04893603Recruiting
TAVR valve test for severe, hard-to-pump heart valve
This trial studies whether a new through-the-blood-vessel heart valve (TAVR) is safe and works well for people with severe aortic stenosis who are too risky for traditional surgery. If you qualify, you would be closely followed to check your symptoms and valve function over time.
BeijingAges 70 years+ - NCT04896177Recruiting
Sirolimus drug balloon for forked coronary artery blockages
This trial studies a sirolimus drug-coated balloon to treat certain “forked” coronary artery blockages (bifurcation lesions). It aims to reduce re-narrowing of the artery and improve blood flow after the procedure.
Shanghai, Shanghai MunicipalityAges 18–85 - NCT04896268Recruiting
Radiofrequency vs Doppler-guided surgery for hemorrhoids
This study compares two treatment approaches for hemorrhoids that are grades II–III and did not improve with non-surgical treatments. It looks at safety and whether the treatments work better for symptom relief.
Saint-DoulchardAges 18–75 - NCT04897334Recruiting
Brain stimulation plus rehab to improve thinking after stroke
This study tests whether a noninvasive brain stimulation treatment, combined with rehabilitation, can improve thinking and other “neurocognition” problems after a recent stroke. It may help people whose thinking has been affected by stroke within the past month.
Philadelphia, PennsylvaniaAges 18–90 - NCT04898647Recruiting
Study of blood thickness in Waldenström’s disease
This study looks at “hyperviscosity,” meaning very thick blood, in people with Waldenström macroglobulinemia (WM). Your results may help doctors better understand who needs treatment and what tests should be used, even if thick blood is not found.
AmiensAges 18 years+ - NCT04898790Recruiting
Testing ways to improve thinking after bone marrow transplant
This study looks at whether a physical activity program and related study measures can improve thinking and memory in older adults around the time of a stem cell transplant. If you qualify and participate, the team will compare outcomes between groups to see what approach works best.
Omaha, NebraskaAges 19 years+ - NCT04898335Recruiting
Tendyne heart valve registry for real-world patient experiences
This registry collects information from people who received the Tendyne mitral valve in routine care. It helps doctors understand how the valve performs in everyday practice and may guide future care.
LinzAges 18 years+ - NCT04899479RecruitingPhase 4
SGLT-2 inhibitor after heart attack to improve heart recovery
This trial studies whether starting an SGLT-2 inhibitor around the time of a heart attack can reduce heart damage size and improve how the heart heals. It focuses on people with a high risk of developing heart failure and who are getting a procedure to open blocked heart arteries.
SeoulAges 18 years+ - NCT04899635Recruiting
Study tests heart muscle function during open-heart surgery
This study looks at how strong the heart muscle squeezes (contractility) using heart tissue from people having planned open-heart surgery. It may help researchers better understand “myocardial fatigue” to improve future heart care.
CoventryAges 18–85 - NCT04901884Recruiting
PET/MR scans before and after radiation for heart-lung effects
This study uses special PET/MR imaging before and after radiation treatment to better understand how radiation may affect the heart and lungs. It may help researchers find ways to predict and monitor these side effects using imaging and blood tests.
Toronto, OntarioAges 18 years+ - NCT04903951RecruitingPhase 2
Check if early breathing support after stroke helps sleep apnea
This trial tests whether starting a breathing-support treatment soon after a first stroke improves outcomes in people who also have sleep apnea. It may help reduce complications and support recovery if you meet the specific timing and health criteria.
Matosinhos MunicipalityAges 18–80 - NCT04903912Recruiting
Study of people with blocked blood vessels or aneurysms
This registry study follows people with peripheral artery disease (blocked leg arteries), certain carotid artery narrowing, or an abdominal aortic aneurysm. It may help doctors better understand these conditions and improve care over time.
NaplesAges 18–90 - NCT04906356Recruiting
Study of SCAD after a heart attack or unstable chest pain
This study looks at people admitted with a recent heart event (STEMI, NSTEMI, or unstable angina) and who were found to have SCAD on a heart scan. It may help doctors better understand and manage SCAD after these urgent events.
Vancouver, British ColumbiaAges 18 years+ - NCT04905017Recruiting
Transcatheter valve treatment study for severe tricuspid valve leakage
This study tests a new, catheter-based procedure to treat moderate-to-severe leaking of the tricuspid valve (a heart valve on the right side). It’s for people who are high surgical risk and might benefit from replacing the valve without open-heart surgery.
Los Angeles, CaliforniaAges 18 years+ - NCT04905160Recruiting
Care planning after hospital stays to reduce readmissions
This study tests a care-coordination plan to see if it helps people leave the hospital and prevents them from needing to come back soon. It focuses on certain heart-related hospital diagnoses and, for some parts, also includes people with recent COVID-19.
Phoenix, ArizonaAges 18 years+ - NCT04908423RecruitingPhase 4
Xeomin to improve walking after stroke
This trial tests Xeomin (a type of botulinum toxin) to improve walking and leg mobility after stroke-related muscle stiffness. It’s for people who have spasticity (tight, stiff muscles) that affects how they clear their toes during walking.
Charlotte, North CarolinaAges 18–79 - NCT04910841Recruiting
Testing a glucose-monitoring device in septic shock ICU
This trial checks whether a continuous glucose monitoring system (“CGM GUARDIAN 2”) can be used safely and effectively for people in the ICU who have septic shock and high blood sugar. It may help the medical team track blood sugar more easily while you receive insulin.
NiceAges 18 years+ - NCT04912323Recruiting
Drug dissolving stent for blocked below-knee arteries
This trial studies a drug-eluting dissolving scaffold placed in blocked arteries below the knee to improve blood flow. It may help people whose leg circulation problems are severe enough to limit walking or threaten the limb, but only if their blockages fit specific imaging and procedure requirements.
GrazAges 18–90 - NCT04912739Recruiting
Targeted health conversations in primary care
This study offers targeted health dialogues with people receiving care in primary settings, to see how well these conversations can support health. You may be invited because of your age and where you receive healthcare in Skåne County.
Malmö, Skåne CountyAges 40–70 - NCT04911738Recruiting
Virtual reality glasses to improve balance after stroke
This trial studies whether virtual reality glasses training can improve balance and body alignment after a recent stroke. It will also compare how stroke participants with balance problems respond versus people without stroke.
GrenobleAges 18–80 - NCT04911491Recruiting
Breathing muscle training for people with kidney disease
This study tests whether training your breathing muscles can improve health in people with chronic kidney disease (stage 3–4). It may help how your body handles daily activity and circulation-related measurements, compared with usual care.
Aurora, ColoradoAges 50 years+ - NCT04912518Recruiting
Dexmedetomidine for heart protection after a specific heart attack
This study tests whether dexmedetomidine can protect the heart in people who are having a specific type of heart attack (anterior STEMI) when treated within 6 hours of symptom start. You may be considered if your diagnosis and vital signs fit the study safety rules, and if you can take part in follow-up.
Hefei, AnhuiAges 18–75 - NCT04913727Recruiting
Testing heart scan predictions after mitral valve repair
This trial studies severe secondary mitral valve leaking and uses heart imaging to predict how well the heart and symptoms improve after a less-invasive valve procedure. It may help doctors better forecast who benefits most from this repair.
BernAges 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
- Cancer
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- 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.