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
- NCT05427084RecruitingPhase 2/Phase 3
Canagliflozin to reduce inflammation in heart artery disease
This trial tests canagliflozin to see if it lowers “vascular inflammation” in people with diabetes and stable coronary artery disease. It may help reduce harmful inflammation signals that can raise future heart risk.
Ottawa, OntarioAges 18 years+ - NCT05427370Recruiting
Compare bypass or stent treatment in weak heart patients
This study compares two ways to restore blood flow to the heart—bypass surgery (CABG) or stent procedure (PCI)—in people with a weak pumping heart. It looks at which approach works best when the heart muscle is not pumping well and there are multiple blocked heart arteries.
Los Angeles, CaliforniaAges 18 years+ - NCT05427435Recruiting
Testing alcohol treatment of a heart vein during atrial fibrillation ablation
This study tests whether applying a small amount of alcohol to a specific heart vein (“vein of Marshall”) is safe and feasible during a standard atrial fibrillation (AF) ablation. It may help improve AF treatment, but the goal here is mainly to see if the approach can be done safely in the right patients.
PessacAges 18 years+ - NCT05428631Recruiting
Monitoring device tested in severe kidney and heart failure
This study checks how safe a small heart-pressure monitoring device is for people with advanced heart failure and severe kidney problems. It looks at whether doctors can continuously track heart filling/pressure to help manage symptoms and reduce risks.
Nîmes, GardAges 18–85 - NCT05431296Recruiting
Glucose monitoring after a heart attack in type 2 diabetes
This study tests a way of checking blood sugar closely after an acute coronary event (a heart-related emergency) in people with type 2 diabetes. It may help doctors understand the best monitoring approach to improve safety and care during recovery.
LondonAges 18 years+ - NCT05432024Recruiting
Heart MRI checks how well ablation lesions form
This study uses a special heart MRI to look at how ablation creates scar tissue in people with atrial fibrillation. It may help doctors improve how ablation is done and understand which technique works best.
NieuwegeinAges 18 years+ - NCT05432466RecruitingPhase 3
Celiprolol vs placebo for vascular Ehlers-Danlos heart vessel fragility
This Phase 3 study compares celiprolol (a blood vessel–related medicine) versus placebo to see which better reduces vascular risks in people with vascular Ehlers-Danlos syndrome. It requires confirmed COL3A1 genetic findings and specific imaging before starting.
Culver City, CaliforniaAges 15–64 - NCT05434065RecruitingPhase 2
Celecoxib for brain bleeding after onset
This Phase 2 trial tests whether celecoxib (an anti-inflammatory medicine) can improve outcomes after an intracerebral hemorrhage (a type of stroke caused by bleeding in the brain). It also studies how the medicine may help the body recover. You would need to start treatment quickly after symptoms begin and meet several safety and bleeding-control requirements.
TaipeiAges 20–80 - NCT05434195Recruiting
Study folate in pregnancies with high blood pressure
This study looks at how a vitamin called tetrahydrofolate may affect pregnancies with preeclampsia or increased risk of high blood pressure. Participants may receive the supplement to help researchers understand key biology and potential benefits or harms.
Oxford, OxfordhsireAges 18–45 - NCT05434819Recruiting
Ablation study during heart surgery for atrial fibrillation
This trial looks at whether a special heart rhythm treatment called “ablation” works well when done during certain heart operations. It may help reduce atrial fibrillation (AF) symptoms or future abnormal rhythm episodes for people who are already having surgery.
Hamilton, OntarioAges 18 years+ - NCT05434507Recruiting
Clip procedure for leaking tricuspid valve in high-risk patients
This trial studies whether a minimally invasive “clip” procedure can safely improve tricuspid valve leakage (a heart valve that doesn’t close tightly). It focuses on older adults who are considered too high-risk for open-heart surgery and still have enough heart pumping strength to benefit.
Shanghai, Shanghai MunicipalityAges 60–90 - NCT05435781RecruitingPhase 4
Hydrocortisone added during stress in people on low-dose prednisolone
This study tests whether adding supplemental hydrocortisone during stressful events can prevent problems in people who develop adrenal insufficiency from long-term prednisolone. It is meant to see if “stress dosing” is safer and helps the body respond to stress.
AarhusAges 50 years+ - NCT05437237Recruiting
AI test to triage stroke patients using EEG in ambulances
This study tests an AI computer algorithm that helps decide how urgently a person with suspected stroke should be treated, using a special brain-wave test (EEG) in the ambulance. It may help teams spot certain stroke patterns faster and route patients to the right care sooner.
Amsterdam, North HollandAges 18 years+ - NCT05437562Recruiting
Trial compares recovery after lower-leg amputation in Veterans
This trial looks at outcomes after a below-knee (lower-leg) amputation in Veterans. It focuses on people who have blood flow likely to heal and who plan to join rehabilitation to walk again with a prosthesis.
Decatur, GeorgiaAges Any age - NCT05439863Recruiting
Valve procedure trial for severe aortic valve problems
This trial studies people with severe aortic valve disease who will receive a catheter-based valve replacement (TAVR). It aims to check how well this approach works for fixing a narrowed or leaky aortic valve, and to monitor outcomes afterward.
Nanjing, JiangsuAges 18 years+ - NCT05437900RecruitingPhase 4
A heart test to guide stent placement using blood-flow measurements
This Phase 4 study tests a way to measure blood flow in heart arteries to help doctors choose the best stent plan. It may help improve safety and effectiveness for people having elective heart stent procedures for stable angina or certain heart attacks.
Aalst, Oost-VlaanderenAges 18–85 - NCT05438121Recruiting
Tests a drug-coated balloon to stabilize clogged heart arteries
This trial studies whether a drug-coated balloon can better treat new, narrowed spots in multiple coronary arteries and “stabilize” the plaque. It may help improve blood flow after a procedure called balloon angioplasty for selected patients.
Ansan-si, Gyeonggi-doAges 18–85 - NCT05437965Recruiting
Registry study for repeat coronary blockages after stents
This study follows adults who have fast, unexplained re-narrowing of a coronary stent, to better understand what causes it and how to monitor it. You may help by allowing the study team to collect medical information over time.
Beijing, Beijing MunicipalityAges 18 years+ - NCT05439031RecruitingPhase 2
Stereotactic radiation to reduce recurrent dangerous heart rhythm episodes
This Phase 2 study tests a precise form of radiation therapy to control recurrent ventricular tachycardia (VT), a dangerous fast heart rhythm. It may help people whose VT keeps coming back despite heart medicines and/or ablation, especially when ablation is not possible.
Amsterdam, North HollandAges 18 years+ - NCT05438862Recruiting
Early aortic valve surgery versus watchful waiting
This trial compares two approaches for people with a leaking aortic valve but no symptoms: early surgery or careful monitoring (“watchful waiting”). It aims to see which strategy better prevents future heart problems and when surgery is most helpful.
AalstAges 18 years+ - NCT05442671Recruiting
Exercise coaching program for children with pulmonary hypertension
This trial tests whether a structured exercise program, done with remote support, is safe and helpful for children with pulmonary hypertension. It aims to improve how well kids function day-to-day while they stay on their usual PH medications.
Philadelphia, PennsylvaniaAges 8–18 - NCT05442970Recruiting
Study to assess risk of atrial fibrillation
This study looks at how to better judge a person’s risk of developing atrial fibrillation, a type of irregular heartbeat. You may help researchers by completing interviews and assessments that guide future risk estimates.
HamburgAges 18–85 - NCT05443633Recruiting
Brain and speech training for people with aphasia
This study looks at ways to improve language (speaking and understanding) for people with aphasia caused by stroke or dementia, using MRI to study brain function. It may help by testing language-focused approaches and how brain activity changes during treatment.
Tucson, ArizonaAges 21–80 - NCT05444452Recruiting
Stent treatment study for blocked heart arteries
This study tests a coronary stent approach for people with significantly blocked heart arteries. It may help by improving blood flow, and it compares treatment in a structured way while monitoring safety and outcomes.
SeoulAges 19 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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- Immune system & allergy
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- Skin
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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.