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
- NCT04615065Recruiting
Biobank study collecting emergency data for very sick patients
This study collects health and sometimes blood sample information from people arriving at the emergency department with high-risk or serious conditions. The goal is to build a large emergency “biobank” to help researchers better understand and improve urgent care.
GroningenAges 18 years+ - NCT04617717Recruiting
Personalized treatment for abnormal heartbeats needing ablation
This trial studies a customized treatment plan for people who have premature ventricular beats (PVCs) and have been referred for a procedure called PVC ablation. It may help doctors choose the best approach for stopping these extra heartbeats.
OsloAges 18–90 - NCT04620642Recruiting
Registry for adults treated with clot-busting or clot removal
This trial is a registry that collects information from adults who were hospitalized for an ischemic stroke and received either clot-busting medicine or a procedure to remove the clot. It may help doctors better understand stroke treatments and outcomes.
LyonAges 18 years+ - NCT04621357Recruiting
Testing how brain swelling affects recovery after brain bleeding
This study looks at brain swelling (“cerebral edema”) after a spontaneous brain bleed and how it relates to outcomes. It mainly involves people who can have early care and MRI scans, to better understand what affects recovery.
LilleAges 18 years+ - NCT04621279Recruiting
Cooling treatment study for babies with mild brain injury
This study compares different approaches to “cooling” treatment in newborns with mild hypoxic-ischemic encephalopathy (mild brain injury from not enough oxygen around birth). The goal is to see which approach works best and is safest for babies like yours.
Dallas, TexasAges 8 months+ - NCT04624490RecruitingPhase 1
Lung function MRI using a special gas in volunteers
This Phase 1 study tests a lung scan that uses a special gas and MRI to measure how well your lungs work. It includes healthy volunteers and people with lung disease to see how well the scan works and how safe it is.
Kansas City, KansasAges 3 years+ - NCT04624295RecruitingPhase 4
Aspirin soon after certain bleeding stroke, after clot-busting therapy
This trial studies whether starting aspirin early is safe and helpful for people who, after clot-busting treatment for an ischemic stroke, develop a specific type of small brain bleeding called hemorrhagic infarction. You might benefit if your scan later shows this pattern of bleeding and you are not able to take blood-thinners or aspirin is safe for you.
HangzhouAges Any age - NCT04627870Recruiting
Drug-coated balloon treatment for recurrent brain stent narrowing
This pilot study tests a catheter treatment called a drug-coated balloon to treat repeat narrowing inside a previously placed brain stent. It may help people whose stent has narrowed again and is causing reduced blood flow or stroke/TIA symptoms despite best medical therapy.
BeijingAges 18–80 - NCT04628078Recruiting
Echocardiogram-guided heart procedure registry for atrial fibrillation
This study keeps a real-world record of people with atrial fibrillation who are planning a procedure to close off the heart’s left atrial appendage. Doctors use echocardiography (heart ultrasound) to guide the closure and track outcomes to improve care.
BernAges 18 years+ - NCT04630873RecruitingPhase 1
Botox dilution options for walking in hemiplegic gait
This Phase 1 study tests whether using a lower or higher dilution of Botox injections improves walking in people with hemiplegic gait. The goal is to see which dilution works better (and is safe) for walking and leg stiffness.
IoanninaAges 18 years+ - NCT04629144RecruitingPhase 2
Belimumab for active cryoglobulinemia vasculitis after rituximab
This Phase 2 study tests belimumab (or a placebo) to see if it improves safety and disease control in adults with active cryoglobulinemia vasculitis. You may be eligible if you have had rituximab induction treatment shortly before joining, and your illness is still active.
BloisAges 18 years+ - NCT04630535Recruiting
Using brief arm treatment before bypass surgery
This trial studies whether a simple, remote “arm treatment” given before scheduled aorto-bifemoral bypass surgery can help protect blood flow during surgery. If you fit the surgery plan and don’t have certain excluded conditions, the study may offer an added protective approach.
Brno, Czech RepublicAges 18 years+ - NCT04634240Recruiting
Staged heart bypass plus TAVR versus TAVR alone
This study compares doing a staged coronary bypass (revascularization) along with a valve procedure (TAVR) versus doing TAVR and medical treatment alone. It aims to see which approach better helps people with both aortic valve narrowing and coronary artery disease.
Huntsville, AlabamaAges Any age - NCT04634487Recruiting
Registry for takotsubo heart condition in Poland
This is a registry study that collects information from people diagnosed with takotsubo syndrome. It helps researchers better understand the condition and may improve care in the future.
WarsawAges Any age - NCT04634552RecruitingPhase 2
Talquetamab study for relapsed or refractory multiple myeloma
This trial studies talquetamab, a medicine given to treat multiple myeloma that has come back or did not respond to prior treatment. It may help shrink tumors and improve disease control, depending on how your myeloma measures and your health status.
Birmingham, AlabamaAges 18 years+ - NCT04634916Recruiting
Check how a dialysis fistula device performs in real life
This study monitors how well the BD WavelinQ endoAVF device works after routine clinical use. It may help people who need a dialysis access fistula by sharing real-world safety and performance data.
La Jolla, CaliforniaAges 18 years+ - NCT04639388Recruiting
Learning about psychosis in children with 22q11.2 deletion syndrome
This study looks at how “psychotic disorders” (like unusual beliefs, hallucinations, or thought changes) show up in children with 22q11.2 deletion syndrome. It mainly focuses on understanding the condition and may help improve care in the future.
Lyon, Auvergne-Rhône-AlpesAges 4–13 - NCT04641286Recruiting
Tracking changes in quick recovery after acute stroke
This study looks at how stroke symptoms and recovery change over time soon after an acute stroke. It may help doctors better predict outcomes and improve care planning for stroke patients.
LondonAges 18 years+ - NCT04641416Recruiting
Ultrasound test for people with HeartMate 3 blood pumps
This study checks whether a noninvasive ultrasound-based method can help diagnose what’s going on in people with a HeartMate 3 blood pump. It may help detect important pump-related changes while keeping the process safer for certain high-risk situations.
ViennaAges 18–75 - NCT04642430RecruitingPhase 4
Test of blood thinners comparing rivaroxaban vs apixaban
This trial compares the bleeding risk of two commonly used blood thinners—rivaroxaban and apixaban—in people with atrial fibrillation (AF). If you’re starting an anticoagulant for a new AF diagnosis, this may help doctors choose the safer option for you and others.
Victoria, British ColumbiaAges 18 years+ - NCT04644094Recruiting
Dexamethasone for heart function after very early birth
This study looks at how giving a steroid medicine (dexamethasone) after very early birth affects the baby’s heart function. It may help doctors better understand risks and benefits for babies who need treatment for serious lung problems.
Montreal, QuebecAges 1 minute+ - NCT04645199Recruiting
Long-term follow-up study for blood and bone marrow diseases
This study is collecting long-term follow-up information from people diagnosed with certain blood and bone marrow conditions. It may help doctors understand what happens over time and improve future care, but you’re mainly contributing data rather than receiving a new treatment.
Tianjin, Tianjin MunicipalityAges Any age - NCT04645862Recruiting
4D heart scan for people with a bicuspid aortic valve
This study uses a special 4D heart scan to learn how well your bicuspid aortic valve works. It may help doctors better understand valve function and plan care, but the scan involves imaging contrast in some cases.
Philadelphia, PennsylvaniaAges 18 years+ - NCT04647292RecruitingPhase 2
Intensive blood pressure lowering after stroke
This Phase 2 study tests whether aiming for a lower blood pressure targets after a stroke reduces the risk of future problems. You may be asked to measure your blood pressure at home and follow the study’s treatment plan.
DublinAges 40 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
- 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.