Cardiology
Heart & circulation clinical trials
Heart disease, blood pressure, and disorders of the blood vessels and circulation. We’re tracking 9,609 recruiting studies in this area right now.
By phase
- Not applicable7,632
- Phase 4472
- Phase 2469
- Phase 3439
- Phase 1350
- Phase 1/Phase 2160
- Phase 2/Phase 387
Top conditions
- Stroke797
- Heart Failure534
- Hypertension388
- Cardiovascular Diseases373
- Coronary Artery Disease363
- Multiple Myeloma327
- Atrial Fibrillation259
- Ischemic Stroke190
- Atrial Fibrillation (AF)154
- Acute Ischemic Stroke139
- Pulmonary Hypertension104
- Myocardial Infarction97
- Congenital Heart Disease84
- Peripheral Arterial Disease79
- Stroke, Ischemic78
- Aortic Valve Stenosis76
- Obesity74
- Acute Coronary Syndrome73
Leading sponsors
- Mayo Clinic93
- Assistance Publique - Hôpitaux de Paris88
- National Taiwan University Hospital68
- China National Center for Cardiovascular Diseases60
- Second Affiliated Hospital, Zhejiang University, School of Medicine58
- Beijing Tiantan Hospital53
- Insel Gruppe AG, University Hospital Bern49
- Massachusetts General Hospital49
- Yonsei University48
- Johns Hopkins University45
Where studies are running
- California453
- Alabama196
- Arizona181
- Massachusetts173
- New York168
- Florida140
- Texas122
- Maryland118
- Minnesota117
- Illinois112
Recruiting studies9,609 total
- NCT04343443Recruiting
Test whether a lung ultrasound helps discharge planning after heart failure
This study looks at people hospitalized for worsening heart failure with weaker pumping (reduced ejection fraction). It tests whether a lung ultrasound evaluation near discharge can improve how doctors decide it is safe to send you home.
Vandœuvre-lès-NancyAges 18 years+ - NCT04772768Recruiting
Checking problems in vein bypass grafts in people with recurring chest pain
This study looks at how vein bypass grafts are working over time in people who had heart bypass surgery and now have recurring angina (chest discomfort). It may help doctors better understand why symptoms come back and how the heart and grafts change.
AmsterdamAges 18–90 - NCT05885295Recruiting
Testing thinking and memory after stroke using cognitive exams
This study looks at how thinking and memory change after a stroke using short cognitive tests. It may help researchers better understand which brain changes affect thinking, and how to measure them accurately.
LondonAges 18 years+ - NCT05089162Recruiting
Testing a heart ultrasound approach in chronic heart failure
This study looks at people with chronic heart failure with weaker pumping function and checks how well a lung/heart ultrasound can assess congestion (fluid buildup). If you qualify, you may help test a better way to evaluate your condition during a planned hospital visit.
Vandœuvre-lès-NancyAges 18 years+ - NCT04332692Recruiting
Check if a lung ultrasound helps evaluate discharge after heart failure
This study looks at whether doing lung ultrasounds can better assess people right before they leave the hospital after an acute heart failure flare. It may help doctors decide when someone is ready for discharge and tailor care to reduce risk after leaving.
Vandœuvre-lès-NancyAges 18 years+ - NCT04343430Recruiting
Hospital study for fluid buildup in heart failure with preserved heart function
This study looks at how well doctors can assess fluid buildup before you leave the hospital if you have a type of heart failure called “preserved ejection fraction.” It may help improve decisions about when and how safely people are discharged.
Vandœuvre-lès-NancyAges 18 years+ - NCT05097898Recruiting
Check fluid buildup in heart failure with normal pumping
This study evaluates how well doctors can assess “fluid congestion” in people with chronic heart failure where the heart’s squeezing is still preserved. It may help improve how patients are monitored during hospital visits.
Vandœuvre-lès-NancyAges 18 years+ - NCT05089149Recruiting
Check how lung ultrasound helps manage heart failure congestion
This study looks at people with long-term worsening heart failure who are coming to the hospital for a planned visit, to see how checking “congestion” (fluid buildup) may guide care. It may help the team understand whether lung ultrasound can better assess who needs treatment changes.
Vandœuvre-lès-NancyAges 18 years+ - NCT05883072Recruiting
Using AI to support care for people with diabetes in Pakistan
This study tests whether AI-generated support can be helpful for adults living with diabetes. You may be asked to participate if you live in Pakistan and can legally consent.
Karachi, SindhAges 18–100 - NCT05891145Recruiting
Remimazolam to prevent irregular heartbeat after heart surgery
This trial tests whether a medication called remimazolam can help prevent atrial fibrillation—a common, irregular heart rhythm that can happen after surgery. It focuses on people having a specific planned type of heart bypass surgery and checks if the study medication reduces postoperative rhythm problems.
Yangzhou, JiangsuAges 50–70 - NCT05776797Recruiting
Ablation vs best medicines for CRT patients with permanent atrial fibrillation
This trial compares two approaches—an AV junction ablation procedure versus continued best medical treatment—in people who already have a heart device for heart failure (CRT) but still have ongoing permanent atrial fibrillation. It aims to improve how well your heart rhythm is controlled and how effectively the device can pace your heart.
Liberec, Liberec RegionAges 18–85 - NCT05897333Recruiting
Registry study for isolated coronary artery dilation
This is a “registry” study that collects health information about people who have isolated coronary artery ectasia (an abnormal dilation of a heart artery). It may help doctors better understand what to expect and how these conditions relate to symptoms like chest pain or heart attacks.
AnkaraAges 18–90 - NCT05894863Recruiting
Smart stent for severe leg artery blockages
This trial studies a new “smart” stent placed in the thigh-to-knee artery to treat significant blockages. It may help improve blood flow to the foot, and you would be followed closely to see how well the stent works over time.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT05244629Recruiting
Compare two stents for chronic artery-related gut pain
This trial tests whether an uncovered stent or a covered stent works better for treating chronic mesenteric ischemia (reduced blood flow to the intestines from artery narrowing). It’s meant for adults with symptoms and scans showing significant narrowing in a specific gut artery.
København ØAges 18 years+ - NCT04433052Recruiting
Personalized heart-protection program for people at high risk
This trial tests whether a tailored prevention plan can improve outcomes and help with costs for people at high risk of coronary heart disease. You may join if you’ve had recent heart events or scans show significant blockage, and if you can follow the visit and app requirements.
HelsinkiAges 30–80 - NCT05698628Recruiting
Timing strategies to protect legs during peripheral ECMO
This trial studies whether an “early” or more “conservative” approach to improving blood flow to the leg can prevent limb damage during a type of heart-lung machine called peripheral VA-ECMO. It may help reduce the risk of poor leg blood flow (ischemia) in people with severe heart failure-related shock.
SeoulAges 19 years+ - NCT05767619Recruiting
Digital tool to guide care for chest pain calls
This trial tests a digital decision-support tool that helps emergency teams manage people who call for help because of chest pain. It may improve how safely and consistently chest pain is assessed and treated in the ambulance setting.
Kungsbacka, Region HallandAges 18 years+ - NCT05916898Recruiting
Shockwave treatment after difficult stent expansion
This registry studies how well shockwave therapy works when a previously placed heart stent does not expand well, especially when the artery is quite calcified. Your care team would use it after other tools to prepare the blockage have not worked.
Legnica, Lower Silesian VoivodeshipAges 18–99 - NCT05922540Recruiting
Study of ischemic stroke to improve patient care
This study looks at people who have had an ischemic stroke (a type caused by a blocked blood vessel). It is collecting information over time to better understand care needs and follow-up after stroke.
HunanAges 18 years+ - NCT05936957Recruiting
Heart failure care study for acute and chronic patients
This study welcomes people with heart failure (both sudden/worsening and long-term). It will check how heart failure care is managed, and it only moves forward if you choose to participate.
Ibadan, Oyo StateAges 18–100 - NCT05922644Recruiting
Spinal cord stimulation for consciousness recovery after brain bleed
This trial studies whether short-term spinal cord stimulation can help people regain consciousness after an intracerebral hemorrhage (brain bleed). It’s mainly for patients whose brain function tests suggest they are in a minimally conscious state and who are medically stable enough for the procedure.
Beijing, Beijing MunicipalityAges 18–65 - NCT05924347Recruiting
Imaging study to spot early spine changes in at-risk children
This study uses MRI and physical measurements to look for early signs of scoliosis (a side-bending of the spine) in children who are at higher risk. It may help doctors understand when scoliosis starts and improve early monitoring.
UtrechtAges 8–11 - NCT05937880Recruiting
Leflunomide for kids with stubborn Henoch-Schonlein purpura rash
This trial looks at whether leflunomide can calm Henoch-Schonlein purpura (a childhood rash condition) when the rash is hard to control. If standard treatments don’t stop new or worsening rash, this study may offer another option.
Guangzhou, GuangdongAges 1–18 - NCT03445949RecruitingPhase 4
Best blood-thinner plan after a left heart device procedure
This trial compares which two medicines work best after a device closes off a part of the heart called the left atrial appendage. It may help reduce stroke risk while balancing bleeding risk after your procedure.
Warsaw, Masovian VoivodeshipAges 18 years+
Common questions
- How many heart & circulation clinical trials are recruiting?
- Clin2 is tracking 9,609 recruiting cardiology studies from the U.S. registry right now, out of 14,617 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
- Mouth & dental
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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.