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
- NCT04682483Recruiting
Cardiogenic shock registry to improve care and outcomes
This registry collects information about people who have cardiogenic shock, a serious condition where the heart cannot pump enough blood. Your participation may help doctors learn which treatments and monitoring best improve outcomes.
Weston, FloridaAges 18 years+ - NCT04684602RecruitingPhase 1/Phase 2
Study of stem cells for several short- and long-term illnesses
This early-stage study tests whether injections of mesenchymal stem cells can be safe and helpful for certain chronic (long-term) and acute (short-term) conditions. You might be considered if you can consent, are able to return for follow-up visits, and do not have key reasons that would make stem-cell treatment unsafe.
Culver City, CaliforniaAges 18 years+ - NCT04686253Recruiting
Study how a heart opening and its flow link to stroke
This study looks at the detailed flow pattern through a patent foramen ovale (PFO)—a small opening in the heart—and how it may relate to stroke, TIA, or migraine. Doctors use special ultrasound testing with contrast to better understand who is most affected.
Beijing, Beijing MunicipalityAges 16–65 - NCT04687215Recruiting
Spinal cord stimulation for painful diabetic nerve pain
This trial studies whether a spinal cord stimulator can reduce pain from diabetic nerve damage in the legs. It focuses on people with long-lasting type 2 diabetes and significant, treatment-resistant pain.
Chicago, IllinoisAges 18 years+ - NCT04688190Recruiting
Registry study for choosing a mitral valve treatment
This study collects and compares real-world results to help doctors choose the best treatment for mitral valve “leakiness.” If you have clinically significant mitral insufficiency and have already had a specific heart procedure screening, your echocardiogram results may be used to understand outcomes over at least a month.
Tucson, ArizonaAges 18 years+ - NCT04691037Recruiting
CT heart scan to guide care for stable chest pain
This trial studies whether a CT heart scan (CCTA) can better guide treatment decisions for people with stable chest pain caused by blocked heart arteries. It may help your care team choose the next best step based on scan results.
Beijing, Beijing MunicipalityAges 18 years+ - NCT04690660Recruiting
Study of high blood pressure after pregnancy
This study follows people who had high blood pressure during pregnancy and/or in the first two weeks after delivery. The goal is to better understand postpartum hypertension so care can be improved for mothers at higher risk.
BaselAges 18 years+ - NCT04694248Recruiting
Blood thinner plus antiplatelet after iliac vein stent
This trial looks at whether taking a blood thinner and an additional clot-prevention medicine (antiplatelet) after iliac vein stenting can improve treatment of certain deep vein clots. It may help prevent the clot from coming back or spreading, but it also increases bleeding risk, so careful eligibility screening is important.
Hangzhou, ZhejiangAges 18 years+ - NCT04695106RecruitingPhase 4
Blood Thinner and Heart Attack Prevention Study
This study tests whether taking dabigatran (a blood thinner) combined with ticagrelor (a blood clot preventer) is safe and effective for patients with irregular heart rhythm (atrial fibrillation) who recently had a heart attack and received a stent. The goal is to prevent future blood clots while minimizing bleeding risks.
Gdansk, Pomeranian VoivodeshipAges 18 years+ - NCT04696081Recruiting
Atrial fibrillation treatment in people with active cancer
This trial studies atrial fibrillation (an irregular heartbeat) in adults who have active cancer. It looks at people whose atrial fibrillation started after their cancer diagnosis or returned after cancer diagnosis.
Caen, NormandyAges 18 years+ - NCT04696523RecruitingPhase 2
Xenon gas for brain injury after a ruptured brain aneurysm
This Phase 2 study tests whether xenon gas can reduce brain injury after an aneurysmal subarachnoid hemorrhage (a bleeding caused by a brain aneurysm). It aims to help people who are very sick right after the bleeding by improving brain function outcomes.
Helsinki, HelsinkiAges 18 years+ - NCT04698291Recruiting
Study how genetic differences affect calming immune signals
This study looks at how genetic changes may affect special “calming” immune molecules that help the body resolve inflammation. You may be invited if you already joined the Genes & Health project and had your genome analyzed, and you meet safety and health criteria.
LondonAges 18 years+ - NCT04699279Recruiting
Statin after aortic surgery to protect heart and organs
This trial tests whether taking a cholesterol-lowering medicine (a statin) after certain aortic surgeries can reduce harmful changes in the heart and other organs. You might benefit by lowering the risk of ongoing damage after your acute aortic condition and surgery.
Guangzhou, GuangdongAges 18–85 - NCT04700826RecruitingPhase 4
Preventing stroke, death, and memory decline in atrial fibrillation
This trial looks at ways to help people with atrial fibrillation lower their risk of stroke, premature death, and worsening memory. It may help by identifying which prevention approach works best for a broader community of patients.
Birmingham, West MidlandsAges 55–73 - NCT04703166Recruiting
iPredict study for atrial heart muscle changes over time
This study tracks how “atrial myopathy” (changes in the heart’s upper chambers) develops over time in people with atrial fibrillation or higher heart-risk. It uses special heart MRI pictures and regular follow-up to better predict progression, which may help future care planning.
New Orleans, LouisianaAges 18–79 - NCT04703842RecruitingPhase 1/Phase 2
Study drug effect on heart muscle calcium in advanced heart failure
This trial tests a treatment intended to improve how heart muscle cells handle calcium, which may help heart failure symptoms and heart function. It is mainly for people with advanced heart failure and a low pumping strength of the heart.
San Diego, CaliforniaAges 18–80 - NCT04703699Recruiting
Study of a heart valve implant after 30 days
This study looks at people who already received the Myval THV heart valve implant for severe native aortic valve narrowing. It checks how patients are doing after at least 30 days of follow-up to better understand the valve’s performance.
TallinnAges 18 years+ - NCT04705896RecruitingPhase 4
Albumin for kidney recovery after ICU kidney injury
This trial tests whether giving albumin (a blood protein through an IV) can improve recovery after acute kidney injury in people who are in the ICU and need kidney support treatment. It mainly aims to help the kidneys bounce back better after this serious illness.
Calgary, AlbertaAges 18 years+ - NCT04706481Recruiting
Use of stored, de-identified samples for research
This trial is for people who already agreed to let researchers use their stored biological samples and medical information that has been removed of personal identifiers. It may help future studies by allowing researchers to analyze existing samples without using new samples from you.
Hong KongAges Any age - NCT04707105Recruiting
Study of brain bleeding in hospitalized adults
This study follows adults who are hospitalized after a type of brain bleed called primary intracerebral hemorrhage. It mainly tracks what happens after the bleeding to help doctors understand outcomes and care needs.
Hangzhou, ZhejiangAges 18 years+ - NCT04707261RecruitingPhase 4
Testing how dapagliflozin affects anemia in heart failure
This trial studies whether dapagliflozin (a heart-failure medicine) can improve anemia in people with heart failure. It may help explain why some patients feel better and how anemia changes when this medicine is used.
Xiangtan, HunanAges 18–100 - NCT04709900Recruiting
Tests for stable chest pain using heart scans and pressure measurements
This trial studies how well different heart tests (imaging the blood flow and measuring blood pressure in the heart) work for people with stable chest pain. It may help guide safer, more accurate evaluation when you are not having a heart attack.
CopenhagenAges Any age - NCT04713657RecruitingPhase 1
Beta-blocker study for heart muscle function in young babies
This trial tests whether a beta-blocker called propranolol can improve how well heart muscle cells work in very young babies with certain congenital heart conditions. It mainly looks at safety and how the medicine affects the heart, which could help guide future treatments.
New York, New YorkAges 4 weeks–2 months - NCT04711746Recruiting
Clonal blood changes after certain lung blood clots
This study looks at whether a specific kind of blood-cell change (“clonal hematopoiesis”) is linked to a lung blood clot (pulmonary embolism) that happened without a clear trigger. It compares people with unprovoked clots to people with provoked clots, after checking for inherited clotting risk factors.
AmiensAges 18–65
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
- 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.