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
- NCT04647331Recruiting
Study antibiotic levels in heart valve infection
This trial measures how your body handles certain intravenous antibiotics used for endocarditis, an infection of the heart valves. It may help doctors understand the best antibiotic dosing for people with valve infections.
GothenburgAges 18 years+ - NCT04651010Recruiting
MRI study to predict outcomes after clot removal in stroke
This study uses special MRI scans to look for patterns that may predict recovery after a specific type of stroke caused by a blocked brain artery. It may help doctors choose the best treatment and better understand who benefits most from clot removal.
PoitiersAges 18 years+ - NCT04653428Recruiting
German registry for repairing a severely leaky tricuspid valve
This study records patients who get a catheter-based repair for a severely leaky tricuspid heart valve. It helps doctors and researchers learn how these treatments work in real-world care.
MunichAges 18 years+ - NCT04656184RecruitingPhase 3
Anakinra vs IVIG for kids who don’t respond to first IVIG
This study compares two treatments—anakinra and IVIG—for children with Kawasaki disease who still have fever after their first standard IVIG treatment. It aims to find which option works better and is safer for “IVIG non-responders” who may be at risk for heart complications.
Le Kremlin-Bicêtre, Val De MarneAges 3 months–17 years - NCT04654988RecruitingPhase 4
Immunosuppression study for active myocarditis or inflammatory cardiomyopathy
This Phase 4 study tests whether weakening the immune system (immunosuppression) works better for people with active myocarditis or inflammatory cardiomyopathy. It includes extra heart tests—two heart muscle biopsies and two heart MRI scans—to confirm the diagnosis and guide treatment.
WarsawAges 18–65 - NCT04654650Recruiting
Study of adults with pulmonary hypertension for long-term data
This study follows adults with pulmonary hypertension over the long term and collects information (and possibly samples) to better understand how the condition changes over time. It may help researchers learn what factors affect outcomes, which can improve care in the future.
Hamburg, Free and Hanseatic City of HamburgAges 18 years+ - NCT04656080Recruiting
Test heart and lung exercise capacity after transplant
This study uses a treadmill or stationary bike test to measure how well your heart and lungs work after a heart transplant. It may help researchers see whether this type of testing is safe and useful in transplant follow-up.
Dallas, TexasAges 18 years+ - NCT04657861RecruitingEarly Phase 1
BCMA/TACI CAR-T for relapsed or refractory multiple myeloma
This early-phase study tests a CAR-T cell treatment made to target BCMA and TACI proteins in multiple myeloma. It may help people whose myeloma has come back or did not respond to prior treatments, especially after certain prior therapies.
Hangzhou, ZhejiangAges 18–75 - NCT04657783Recruiting
French cohort study of people with type 1 diabetes
This study follows people with type 1 diabetes in France to better understand the condition over time. It may help researchers improve future care, especially for how type 1 diabetes starts and is managed from early diagnosis onward.
ParisAges 6–100 - NCT04660747Recruiting
Anticoagulant medication choices for cerebral venous thrombosis
This study looks at people with cerebral venous thrombosis who were treated with blood thinners taken by mouth (or started within the first 30 days). It uses observational data to understand how these treatments are used and what outcomes may follow.
Amsterdam, North HollandAges 18 years+ - NCT04662294RecruitingEarly Phase 1
CD70-targeted CAR T therapy for CD70-positive blood cancers
This trial tests a customized immune-cell treatment (CAR T) that targets CD70 on cancer cells in certain blood cancers. It may help people whose disease has returned or did not respond to standard treatments.
Hangzhou, ZhejiangAges Any age - NCT04662970Recruiting
Imaging after a heart device to optimize pacing settings
This study uses a heart MRI (a special scan) to better map the heart’s electrical activity, with the goal of fine-tuning settings on your implanted pacing device. It’s meant to improve how well the device coordinates your heartbeat.
Innsbruck, TyrolAges 18 years+ - NCT04663399Recruiting
Study immune changes after stroke treatment
This study looks at how the body’s immune system responds after an acute ischemic stroke that may be treated with a procedure called mechanical thrombectomy. It may help doctors understand what immune changes happen after treatment and improve future care.
Paris, ParisAges 18 years+ - NCT04664946Recruiting
Intra-arterial treatment for stroke when no reperfusion was given
This trial tests an “intra-arterial” approach (a treatment delivered through an artery to the brain) for people with ischemic stroke who were not given clot-busting therapy or a clot-removal procedure. It aims to improve neurological recovery when there wasn’t reperfusion therapy, including in cases where symptoms worsen soon after stroke.
ShenyangAges 18 years+ - NCT04664686Recruiting
Compare two heart-rhythm strategies after CRT for atrial fibrillation
This study looks at whether a “rate control” or “rhythm control” approach works better for people with CRT devices who still have atrial fibrillation. It aims to improve heart failure symptoms and help the heart pace more effectively.
LondonAges 18–85 - NCT04664933Recruiting
Study to protect the brain during clot-removal stroke treatment
This trial tests a brain-protective approach given through an artery during treatment for an acute ischemic stroke when clot removal (endovascular therapy) is planned. It may help reduce brain injury related to the stroke and procedure.
ShenyangAges 18 years+ - NCT04666454RecruitingPhase 4
Medication trial for broken heart (Takotsubo) syndrome
This trial tests an optimized medication approach for people diagnosed with Takotsubo (“broken heart”) syndrome. It may help clinicians find a safer and more effective treatment plan after this heart condition.
AarhusAges 18 years+ - NCT04669548Recruiting
Accuryn monitoring study for people having heart surgery
This registry collects information from patients who are monitored with the Accuryn system during heart surgery and their ICU stay. It helps researchers learn from the system’s signals to better understand patient care around cardiac procedures.
Los Angeles, CaliforniaAges 18 years+ - NCT04672551Recruiting
EMDR therapy for PTSD after a heart attack
This trial studies whether EMDR (a structured therapy that helps process distressing memories) can reduce PTSD symptoms in people who developed PTSD after a cardiac event. It may help you feel less overwhelmed by memories and stress related to the heart event.
ZurichAges 18–70 - NCT04674449Recruiting
Tests a targeted plan for people with chest pain from heart artery disease
This study aims to match people with angina (chest pain from heart artery problems) to the most helpful treatment plan based on their test results. It’s done around the time doctors are planning an invasive heart scan to look at the coronary arteries.
CorkAges 18 years+ - NCT04675918Recruiting
Registry for children’s in-hospital cardiac arrest
This study collects information about children (from 1 month to 18 years) who have a cardiac arrest while in the hospital. The goal is to better understand what happens during these emergencies and improve care in the future.
MadridAges 1 month–18 years - NCT04679740Recruiting
Magnesium stent used in routine care registry study
This is a registry study that follows people who receive a resorbable magnesium scaffold (a temporary artery support used during procedures). The goal is to learn how the device performs and how patients do over time in real-world use.
CairnsAges 18 years+ - NCT04680442RecruitingPhase 2
Keeping HER2 therapy when your heart function is weaker
This trial studies whether it’s safe to continue HER2-targeted breast cancer treatment (like trastuzumab, pertuzumab, or T-DM1) even when heart function (left ventricle) is reduced. It may help people avoid stopping a helpful cancer medicine because of heart concerns.
Porto Alegre, Rio Grande do SulAges Any age - NCT04682223Recruiting
Online speech therapy for people with stroke-related aphasia
This study tests whether telerehabilitation (therapy done by video/remote technology) can improve communication after a stroke caused aphasia. It may help you practice speech and understanding skills at home or from a convenient location.
Columbia, South CarolinaAges 21–80
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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- Pain
- Injuries & trauma
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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.