Clinical trials: Cerebrovascular Circulation
Depression, Serotonin Deficiency
Human Cerebral Blood Flow and Serotonin
Breathing, blood pressure, and blood flow into the brain are controlled - in part - by small areas in the brainstem; the central chemoreceptors.
- Trial name
- NCT05957094
- Testing
- Pharmacological agent: Citalopram
- Where
- Canada
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- University of British Columbia
Cerebrovascular Function, Cognition
Ketone Dose and Cerebral Blood Flow Study
Ketone bodies are produced by the liver during periods of food scarcity or severe carbohydrate restriction. Blood ketones are an alternative fuel source used by the brain, heart, and skeletal muscle during periods of fasting.
- Trial name
- kCBF (NCT06032156)
- Testing
- Low Dose β-OHB, High Dose β-OHB
- Where
- Canada
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- McMaster University
Healthy Brain Perfusion
Improving Human Cerebrovascular Function Using Acute Intermittent Hypoxia
This study uses magnetic resonance imaging to determine whether 3 weeks of repeated exposure to Acute Intermittent Hypoxia can improve brain blood flow or blood flow regulation in healthy adults.
- Trial name
- NCT05164705
- Testing
- Acute Intermittent Hypoxia
- Where
- United States
- Volunteers
- 33 people, healthy volunteers welcome
- Sponsor
- Northwestern University
Anterior Cerebral Artery Syndrome, Anterior Cerebral Artery Stroke
Transcranial Doppler Evaluation After Endovascular Thrombectomy for Acute Ischemic Stroke (PRECISE-TCD)
Endovascular thrombectomy (EVT) improves outcomes in acute ischemic stroke caused by large vessel occlusion. Despite successful recanalization, early neurological deterioration (END) remains frequent and is associated with poor…
- Conditions
- Anterior Cerebral Artery Syndrome, Anterior Cerebral Artery Stroke, Acute Ischemic Stroke, Cardioembolic Stroke
- Trial name
- NCT07013396
- Testing
- Transcranial Doppler (TCD) examination
- Where
- United States
- Volunteers
- 100 people
- Sponsor
- Virginia Commonwealth University
Traumatic Brain Injury, Subarachnoid Hemorrhage
Cerebral Perfusion Pressure (CPP) Management Information Feedback and Nursing
The aim of the initial proposal was to evaluate, in the context of optimal medical management, the impact of a bedside system of cerebral perfusion pressure (CPP) information feedback on nursing moment-to-moment management of…
- Trial name
- NCT00194441
- Testing
- Bedside display of cerebral perfusion pressure information
- Where
- United States
- Volunteers
- 260 people
- Sponsor
- University of Washington
Acute Ischemic Stroke
The Correlation Between CITED2 and Collateral Circulation in Acute Ischemic Stroke
Evaluating the collateral circulation of acute ischemic stroke (AIS) mainly depends on the imaging examination. At present, there is no effective and sensitive biomarker for collateral circulation.
- Trial name
- NCT05345366
- Testing
- non-applicable
- Where
- China
- Volunteers
- 130 people
- Sponsor
- Zhujiang Hospital
Genetic Predisposition to Disease, Healthy Volunteers
This Study Consists of Two Study Parts Conducted Under a Single IRB. Part I: Short Term ApoE-dependent Cerebral Blood Flow Response to Sirolimus in Cognitively Normal Adults Part II: Short Term ApoE-dependent Cerebral Blood Flow and Lung Perfusion Response to Sirolimus in Cognitively Normal Adults
This study consists of two study parts (Part I and Part II) conducted under a single IRB approval. Individuals that participated in Part I of the study were invited to participate in Part II of the study.
- Trial name
- NCT05386914
- Testing
- Sirolimus
- Where
- United States
- Volunteers
- 205 people, healthy volunteers welcome
- Sponsor
- University of Missouri-Columbia
Healthy
Can Erythropoietin Protect the Cerebral Blood Flow and Oxygenation During Simulated Dive?
During facial cooling and especially during breath hold, can mammals - and also humans - elicit a so called dive reflex, causing bradycardia, peripheral vasoconstriction and centralization of blood flow to brain, lungs and heart…
- Trial name
- NCT00265486
- Testing
- Recombinant human Erythropoietin
- Where
- Denmark
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Copenhagen University Hospital, Rigshospitalet
Stroke, Vascular Diseases
Passive Limb Movement Study
Stroke survivors have compromised vascular function which may contribute to secondary stroke risk, cardiovascular disease, and may limit their exercise tolerance.
- Conditions
- Stroke, Vascular Diseases, Ischemic
- Trial name
- PLM (NCT05935670)
- Testing
- Ischemic Conditioning
- Where
- United States
- Volunteers
- 44 people, healthy volunteers welcome
- Sponsor
- Medical College of Wisconsin
Aortic Valve Stenosis, Extracorporeal Circulation
Cerebral Embolic Load in Patients Undergoing Surgical Aortic Valve Replacement: A Comparison of the Conventional With the Minimized Extracorporeal Circulation Technique Using Transcranial Doppler Ultrasound
In this study, the investigators aim to compare cerebral embolic load in patients undergoing surgical aortic valve replacement using either the minimized extracorporeal circulation or the conventional extracorporeal circulation…
- Trial name
- AKE-MECC (NCT02308566)
- Testing
- Minimized Extracorporeal Circulation (MECC), Conventional Extracorporeal Circulation (CECC)
- Where
- Switzerland
- Volunteers
- 48 people
- Sponsor
- Insel Gruppe AG, University Hospital Bern
Cerebrovascular Regulation
Brain Blood Flow Responses at Rest and During Exercise
Tight regulation of brain blood flow is integral for delivery of oxygen and energy for survival. During childhood, the brain has a twofold higher metabolic requirement, thus requires greater blood flow to match this.
- Trial name
- NCT06142045
- Testing
- RespirACT RA-MR System
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University of British Columbia
Cerebrovascular Function, Cerebral Blood Flow
Mechanistic Effect of Ketones on Cerebral Blood Flow
Oral supplements containing exogenous ketones have recently become available and represent a novel tool for increasing plasma ketone bodies without the need for dietary restriction.
- Trial name
- MEKC (NCT06217159)
- Testing
- Poikilocapnia, Normocapnia
- Where
- Canada
- Volunteers
- 23 people, healthy volunteers welcome
- Sponsor
- McMaster University
Acute Ischemic Stroke
Safety and Efficacy of Remote Ischemic Conditioning in Patients With Severe Stenosis or Occlusion of Anterior Intracranial Circulation Vessels
The primary purpose of this study is to examine whether remote ischemic treatment can better the 90 - day neurological outcomes in acute ischemic stroke patients having severe stenosis or occlusion of anterior intracranial…
- Trial name
- RICASO (NCT06823128)
- Testing
- RIC, Guideline-based therapy
- Where
- China
- Volunteers
- 458 people
- Sponsor
- The First Affiliated Hospital of University of Science and Technology of China
Depressive Disorder and Anxiety Disorders
PET (Positron Emission Tomography)/Public Speaking Study With A Combination Of 2 Medications In Social Anxiety Patients
This six-arm study is being conducted to measure the effect of a combination of paroxetine and vestipitant on the arousal induced by public speaking in Seasonal Effective Disorder (SAD) patients, using functional brain imaging…
- Trial name
- NCT00343707
- Testing
- vestipitant, paroxetine
- Where
- Sweden
- Volunteers
- 72 people
- Sponsor
- GlaxoSmithKline
Obesity
Ingestion of Lipids and Changes in Cerebral Blood Flow of People With Obesity
This study aims to determine changes in cerebral blood flow of people with obesity after the ingestion of fat.
- Trial name
- NCT02079116
- Testing
- 60 grams of fat plus water solution, Pure water
- Where
- Brazil
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- University of Sao Paulo
Circulatory Failure
NeoAdapt 3: Novel Biomarkers in the Evaluation of Neonatal Circulatory Insufficiency in Babies Suffering From Hypoxic Ischemic Encephalopathy
1 in 1000 babies are born suffering from a lack of oxygen. This is known as hypoxic ischemic encephalopathy (HIE). Infants with this condition can suffer multiple organ problems.
- Trial name
- NCT02051894
- Testing
- Dobutamine
- Where
- United Kingdom
- Volunteers
- 18 people
- Sponsor
- Brighton and Sussex University Hospitals NHS Trust
Pain, Low Back Pain
Changes in Cerebral Blood Flow in Patients Treated With Spinal Cord Stimulation for Low Back and Leg Pain
The primary objective of this study is to identify the brain regions in which activity is affected by SCS. Baseline cerebral blood flow scans with the device turned off will be generated compared to scans produced with the device…
- Conditions
- Pain, Low Back Pain, Leg Pain
- Trial name
- NCT00418301
- Testing
- Precision Spinal Cord Stimulation and PET Scan
- Where
- United States
- Volunteers
- 15 people
- Sponsor
- Boston Scientific Corporation
Stroke, Healthy Participants
Prefrontal Brain Activity and ECG Patterns in Stroke and Healthy Adults
This observational study will evaluate brain activity and heart rhythm patterns in people with and without stroke. Brain activity will be measured using functional near-infrared spectroscopy (fNIRS) and electroencephalography…
- Trial name
- NCT07322107
- Where
- South Korea
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- Pusan National University Yangsan Hospital
Liver Failure, Liver Transplantation
Autoregulation Assessment During Liver Transplantation
Patients with liver failure undergoing liver transplantation often have clinical or sub-clinical encephalopathy that may lead to increased intracranial pressure.
- Conditions
- Liver Failure, Liver Transplantation, Encephalopathy
- Trial name
- NCT01425385
- Testing
- Near infrared spectroscopy monitoring, Autoregulation monitoring
- Where
- United States
- Volunteers
- 10 people
- Sponsor
- Johns Hopkins University
Gender Dysphoria
Brain Health in Transgender Adults
The purpose of this study is to test whether and how a person's brain changes in the first few months after starting gender affirming hormone therapy (GAHT).
- Trial name
- NCT07624747
- Testing
- Magnetic Resonance Imaging, Cognition and Health Tests, Optional Exercise Test
- Where
- United States
- Volunteers
- 72 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison