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
- NCT04914234RecruitingPhase 4
Atenolol vs metoprolol for low blood pressure during nasal surgery
This trial compares two commonly used blood-pressure medicines—atenolol and metoprolol—to see which one works best for keeping blood pressure safely low during nasal surgeries. It may help patients have more stable anesthesia while reducing side effects from blood pressure changes.
Damanhūr, El-BeheiraAges 21–50 - NCT04913870RecruitingPhase 4
Tested blood pressure pills for mild to moderate aortic narrowing
This study tests whether angiotensin receptor blocker (ARB) blood pressure medication helps people with mild to moderate aortic stenosis (a narrowing of the heart’s main valve). It looks at safety and whether the treatment offers benefit for your heart and blood flow.
Québec, QuebecAges 20–99 - NCT04915027Recruiting
Digital follow-up tool for people recovering after stroke
This trial studies a patient-centered digital check-in tool to support follow-up care after stroke. It may help people track recovery and stay connected to support during the months after stroke.
UmeåAges 18 years+ - NCT04916210Recruiting
Study how stroke type affects thinking and recovery
This study looks at what predicts memory and thinking problems after different types of stroke or brain bleeding, and how blood-vessel changes relate to recovery. You may be invited if you recently had a stroke/bleed and can complete a baseline check within 6 weeks.
Phoenix, ArizonaAges 18 years+ - NCT04916340Recruiting
Exercise program study for heart blood vessel function and anxiety
This study tests whether an exercise training program can improve how well blood vessels work in people with PTSD or generalized anxiety. You may be placed into a PTSD, GAD, or healthy control group based on questionnaire scores.
Richmond, VirginiaAges 18–35 - NCT04916197RecruitingPhase 4
Dexmedetomidine sedation after stroke clot removal
This Phase 4 study tests whether using a specific calming medicine (dexmedetomidine) for a longer period after a successful clot-removal procedure helps people do better in the long term. It may help improve outcomes after ischemic stroke where the clot is successfully treated.
Beijing, Beijing MunicipalityAges 18–80 - NCT04916457Recruiting
Studying skin germs in diabetes-related foot skin problems
This study collects skin samples from people with and without type 2 diabetes, especially around foot skin problems, to learn how skin “micro-germs” differ. The goal is to better understand what’s going on in diabetic skin lesions and possibly guide future care.
Guangzhou, GuangdongAges 18–80 - NCT04917328Recruiting
Ultrasound test for less-likely deep vein blood clots
This study looks at whether a certain ultrasound method can safely check for deep vein thrombosis (a blood clot in the leg) when the clot seems less likely. It may help doctors decide faster and avoid unnecessary testing in some people.
StrasbourgAges 18 years+ - NCT04919538Recruiting
Long-term study of relapsing polychondritis
This study follows people who have been diagnosed with relapsing polychondritis over time. It aims to better understand the condition and how it progresses, which may help future care.
Philadelphia, PennsylvaniaAges Any age - NCT04919980Recruiting
Testing a new mitral valve repair device for high-surgery-risk patients
This study looks at a new way to treat a leaky mitral heart valve using the INNOVALVE system. It’s meant for people who have symptoms from mitral regurgitation but are considered high risk for open-heart surgery, to see if the approach can help safely.
Los Angeles, CaliforniaAges 18 years+ - NCT04920253Recruiting
Testing a water-jet treatment to heal certain foot and leg wounds
This trial tests a new “micro water jet” device (Debritom+) to help heal specific hard-to-heal wounds in people who can attend frequent visits. If you qualify, you’ll be assigned to the device treatment or standard care and monitored to see how well the wound heals.
Bradenton, FloridaAges 18 years+ - NCT04922762Recruiting
Exercise program study for blood vessel function in mental health
This study looks at how an exercise program affects blood vessel function (“vascular function”) in people with certain mental health conditions, and compares them to people without those symptoms. It may help researchers understand whether exercise could improve heart and blood vessel health alongside mental health symptoms.
Richmond, VirginiaAges 18–35 - NCT04923191Recruiting
Test heart-procedure guidance from scans versus usual care
This study compares two ways of guiding a heart stent procedure: using information from a special angiography scan versus using standard practice. It may help your care team choose the best treatment to improve heart outcomes after stenting.
AalstAges 18 years+ - NCT04923984Recruiting
Procedure to stop bleeding in a brain bleed using a small plug
This trial looks at a minimally invasive procedure that may stop bleeding in the space between the brain and its outer covering (a subdural hematoma). It’s being offered to people being evaluated in Canada, and the main goals are to see if the approach is safe and practical for routine use.
Winnipeg MB, ManitobaAges 18 years+ - NCT04924491RecruitingPhase 1/Phase 2
Treg cell therapy to help prevent rejection after child heart transplant
This early-phase study tests a cell treatment (Treg cells made from a child’s thymus tissue) to help prevent the body from rejecting a new heart. It may help reduce rejection risk, but it is experimental and involves added risks and follow-up.
Madrid, MadridAges Up to 2 years - NCT04924075RecruitingPhase 2
Belzutifan for cancers linked to VHL or HIF-2α changes
This Phase 2 study tests belzutifan (MK-6482) to treat certain advanced cancers caused by specific gene or disease changes, including VHL-related tumors and HIF-2α related tumors. It may help shrink tumors or slow their growth in people whose cancer matches these genetic or disease patterns.
Los Angeles, CaliforniaAges 12 years+ - NCT04924322RecruitingPhase 2/Phase 3
Early blood clot prevention after certain central line insertions
This trial tests whether starting enoxaparin (a blood-thinner) within 24 hours after placing a specific type of central line can prevent dangerous clots. It may help reduce clot risk in people whose line is placed in the neck or thigh vein, while also tracking bleeding side effects.
Birmingham, AlabamaAges Up to 17 years - NCT04927156Recruiting
Check safety and use of Balt medical devices after treatment
This post-marketing study follows people after they receive Balt medical devices to make sure the devices are safe, work well, and are easy to use in real life. You may be considered if you can consent and your procedure matches their device-use rules.
AngersAges 2 years+ - NCT04927429Recruiting
MRI study to improve heart imaging
This trial helps develop and fine-tune MRI scans that look at the heart and blood vessels. It may help people with heart-related symptoms or conditions by improving how MRI images are created and interpreted.
Washington D.C., District of ColumbiaAges 18–100 - NCT04928482Recruiting
Training with backward walking after stroke
This trial studies whether backward walking training can improve balance and walking speed after a stroke. It may help people who still have trouble staying steady or walking quickly during recovery.
Gainesville, FloridaAges 18–90 - NCT04931550Recruiting
Pacemaker site study to see which placement is best
This study looks at whether placing a pacemaker in different locations affects how patients do afterward. If you recently had a pacemaker implanted and can follow study instructions, you may be able to help researchers compare outcomes.
Hangzhou, ZhejiangAges 18–100 - NCT04933136Recruiting
Check how to stop bleeding after wrist artery catheter
This study tests two ways to control bleeding after a heart/blood-vessel procedure done through the wrist (or elbow) artery. It may help make the procedure safer and improve how well the artery is managed during healing.
Chicoutimi, QuebecAges 18 years+ - NCT06526988Recruiting
Heart failure medication optimization study for clinicians and patients
This study tests tools to help doctors and patients work together to start or adjust heart failure medicines. You may qualify if your heart's pumping strength is low and you are missing certain recommended medications.
Walnut Creek, CaliforniaAges 18 years+ - NCT07698405Recruiting
Advanced rehab technology for arm recovery after stroke
This study tests whether advanced technology-based rehabilitation can help people who have had a stroke regain movement and use of their affected arm. It may be a good option if you have had a single stroke and still have some arm weakness but no severe muscle tightness or memory problems.
Fiorenzuola d'Arda, PiacenzaAges 18 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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- Mental health
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- Women’s health & pregnancy
- Skin
- Blood & lymphatic
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- Infections
- Genetic & congenital
- Bones, joints & muscles
- Pain
- Injuries & trauma
- Mouth & dental
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- 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.