Clinical trials: Regional Blood Flow
Diabetes Mellitus, Type 1, Hypertension
Correlation of Flicker Induced and Flow Mediated Vasodilatation in Patients With Endothelial Dysfunction and Healthy Volunteers.
A couple of studies have shown that illuminating the eye with diffuse flickering light is accompanied by an increase of retinal vessel diameters, optic nerve head blood flow and retinal blood flow.
- Conditions
- Diabetes Mellitus, Type 1, Hypertension, Hypercholesterolemia, Regional Blood Flow
- Trial name
- NCT00432029
- Testing
- Forearm blood flow measurement, Flow mediated dilation (FMD), Zeiss Retinal Vessel Analyzer (RVA), Stimulation with Flicker-light
- Where
- Austria
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Healthy
Role of Nitric Oxide in Optic Nerve Head Blood Flow Regulation During Experimental Increase of Intraocular Pressure in Healthy Humans
Autoregulation is defined as the ability of a vascular bed to adapt its vascular resistance to changes in perfusion pressure. In the eye, several studies have reported that retinal blood flow is autoregulated over a wide range of…
- Trial name
- NCT00914394
- Testing
- NG-monomethyl-L-arginine (L-NMMA), Phenylephrine, Laser Doppler Flowmetry
- Where
- Austria
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Amblyopia, Regional Blood Flow
Amblyopia and Neurovascular Coupling in the Retina of Humans
The visual disorder of amblyopia affects 2% to 3% of the population. Amblyopia is a developmental condition that is characterized by reduced vision of the eye due to the presence of a sensory impediment during visual development…
- Trial name
- NCT00312390
- Testing
- Flicker, Retinal Vessel Diameter, Retinal Blood Flow
- Where
- Austria
- Volunteers
- healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Kidney Diseases
The Effects of Glucagon on Renal Regional Blood Flow in Humans Measured by Magnetic Resonance.
This study will investigating the effects of glucagon on renal blood flow in humans using MRI technology. Glucagon, a hormone produced by the pancreas, plays a key role in regulating blood sugar levels.
- Trial name
- NCT06872060
- Testing
- Glucagon, Glucagon+Exendin9-39, Sodium chloride
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Bispebjerg Hospital
Postural Tachycardia Syndrome
Local Vasoconstriction in Postural Tachycardia Syndrome
The investigators study will determine how often blood flow regulation abnormalities and abnormalities of sympathetic regulation produced by nitric oxide, angiotensin-II, and oxidative stress occur in POTS and the mechanism(s) of…
- Trial name
- NCT01210430
- Testing
- Losartan, Ascorbic Acid (Vitamin C), Normal Saline
- Where
- United States
- Volunteers
- 74 people, healthy volunteers welcome
- Sponsor
- New York Medical College
Healthy
Regulation of Optic Nerve Head Blood Flow During Combined Changes in Intraocular Pressure and Arterial Blood Pressure
Autoregulation is the ability of a vascular bed to maintain blood flow despite changes in perfusion pressure. The existence of an effective autoregulation in the optic nerve head (ONH) circulation has been shown in animals and…
- Trial name
- NCT00914992
- Testing
- Suction cup application, Squatting
- Where
- Austria
- Volunteers
- healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Ocular Physiology, Regional Blood Flow
Effects of Topical Clonidine vs. Brimonidine on Choroidal Blood Flow and Intraocular Pressure During Isometric Exercise
Brimonidine tartrate is an alpha-2 agonist ocular hypotensive drug that exerts its effect by causing both a decrease in aqueous production and an increase in uveoscleral outflow.
- Trial name
- NCT00312416
- Testing
- Clonidin, Brimonidine
- Where
- Austria
- Volunteers
- 18 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Hypoxia, Hypercapnia
Impact of NOS, COX, and ROS Inhibition on Cerebral Blood Flow Regulation
Elucidating cerebrovascular control mechanisms during physiologic stress may help identify novel therapeutic targets aimed at preventing or reducing the impact of cerebrovascular disease.
- Trial name
- NCT03066115
- Testing
- L-NMMA, Ketorolac, Ascorbic Acid
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Healthy
Role of Endothelin-1 in Optic Nerve Head Blood Flow Regulation During Isometric Exercise in Healthy Humans
Autoregulation is defined as the ability of a vascular bed to adapt its vascular resistance to changes in perfusion pressure. In the eye, several studies have reported that retinal blood flow is autoregulated over a wide range of…
- Trial name
- NCT00915070
- Testing
- BQ-123, Physiological saline solution, Laser Doppler Flowmetry
- Where
- Austria
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Sarcopenia in Elderly, Muscle Atrophy
Effects of Cyclical Blood Flow Restriction Exercise on Muscle Hypertrophy and Capillaries in Older Adults
The purpose of this study was to learn if low-load resistance exercise combined with cyclical blood flow restriction (BFR) could improve small blood vessel structure and muscle size in older adults.
- Conditions
- Sarcopenia in Elderly, Muscle Atrophy, Aging
- Trial name
- NCT07689487
- Testing
- Blood Flow Restriction (BFR), Conventional Low-Load Resistance Exercise
- Where
- Turkey (Türkiye)
- Volunteers
- 31 people, healthy volunteers welcome
- Sponsor
- Akdeniz University
Alzheimer's Disease
A Study to Assess Regional Cerebral Blood Flow as an Alzheimer's Disease Biomarker Compared to Positron Emission Tomography in Patients With Mild-to-Moderate Alzheimer's Disease and Cognitively Normal Elderly Subjects (Study MK-0000-068)(COMPLETED)
The aim of the study is to determine if regional cerebral blood flow, measured by dynamic arterial spin labeling (dASL), can be a biomarker for stage of Alzheimer's disease.
- Trial name
- NCT00757939
- Testing
- MRI, FDG-PET
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Merck Sharp & Dohme LLC
Normal Human Subjects
Single Photon Emission Computed Tomography of the Normal Human Brain
The objective of the study is to acquire a database of Single Photon Emission Computed Tomographic (SPECT) studies of the brains of normal human subjects in resting and concentrating states.
- Trial name
- NCT01203891
- Where
- United States
- Volunteers
- 97 people, healthy volunteers welcome
- Sponsor
- Amen Clinics, Inc.
Macular Degeneration, Glaucoma
An Open Study Comparing the Effects of Moxaverine on Ocular Blood Flow in Patients With Age- Related Macular Degeneration, Primary Open Angle Glaucoma and Healthy Control Subjects
A number of common eye diseases such as age-related macular degeneration and glaucoma are associated with ocular perfusion abnormalities.
- Conditions
- Macular Degeneration, Glaucoma, Regional Blood Flow
- Trial name
- NCT00709449
- Testing
- moxaverine
- Where
- Austria
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Retina, Regional Blood Flow
Effect of Antioxidants on Ocular Blood Flow, Endothelial Function, and Cytokine Levels in LPS Induced Inflammatory Model in Humans.
Oxidative stress, which refers to cellular damage caused by reactive oxygen intermediates, has been implicated in many disease processes, especially age-related disorders.
- Conditions
- Retina, Regional Blood Flow, Endotoxin, Escherichia Coli
- Trial name
- NCT00431691
- Testing
- vitamin and mineral supplement, Escherichia coli Endotoxin (LPS), 100% O2
- Where
- Austria
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Kidneys
Cardio and Renovascular Effects of Isometric Exercise in the Healthy Human Measured by PET/CT and MRI
This randomized crossover study aims to validate measurements of renal perfusion in healthy males with PET/CT, using 15-oxygen labeled water as tracer, against the validated multiparametric MRI technique.
- Trial name
- NCT06555211
- Testing
- MRI, PET/CT
- Where
- Denmark
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Bispebjerg Hospital
Healthy
Effect of Antioxidants on Oxygen Induced Vasoconstriction in Lipopolysaccharide (LPS) Induced Inflammatory Model in Humans
Oxidative stress has been implicated in playing a pathogenic role in many disease processes, especially in age-related disorders.
- Trial name
- NCT00914576
- Testing
- Vitamin and mineral supplement, 100% Oxygen, Escherichia coli Endotoxin
- Where
- Austria
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Physiology, Ocular, Microcirculation
Role of Nitrogen Oxide (NO) in the Control of Choroidal Blood Flow During a Decrease in Ocular Perfusion Pressure
Autoregulation is the ability of a vascular bed to maintain blood flow despite changes in perfusion pressure. For a long time it had been assumed that the choroid is a strictly passive vascular bed, which shows no autoregulation.
- Conditions
- Physiology, Ocular, Microcirculation, Regional Blood Flow, Autoregulation
- Trial name
- NCT00810927
- Testing
- Suction cup application, Laser Doppler flowmetry, Measurement of intraocular pressure
- Where
- Austria
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Healthy Subjects/Volunteers
Effects of Combined Heat Application and Acupressure to the Carotid Artery Region on Cerebral Blood Flow in Healthy Adults
The aim of this study is to investigate the effects of combined heat application and acupressure to the carotid artery region on cerebral blood flow in healthy adults
- Trial name
- NCT07324226
- Testing
- Combined heat and acupressure
- Where
- South Korea
- Volunteers
- 9 people, healthy volunteers welcome
- Sponsor
- Pusan National University Yangsan Hospital
Regional Blood Flow
Dysfunction of Nutritive Blood Flow as a Determinant of Anabolic Resistance in Older People
With age, muscles tend to waste at 0.5-1% per year, so that an 80 year old may have only 70% of the muscle possessed at 50. Muscle loss makes it harder to carry out tasks that require strength, keep the body balanced and continue…
- Trial name
- Dunhill01 (NCT01734616)
- Testing
- Old Exercise, Old Acute Cocoa, Old 7 Day Cocoa
- Where
- United Kingdom
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- University of Nottingham
Healthy
Regulation of Optic Nerve Head Blood Flow During Combined Changes in Intraocular Pressure and Arterial Blood Pressure
Autoregulation is defined as the ability of a vascular bed to adapt its vascular resistance to changes in perfusion pressure. In the eye, several studies have reported that retinal blood flow is autoregulated over a wide range of…
- Trial name
- NCT00912665
- Testing
- Laser Doppler Flowmetry, Goldmann applanation tonometer, squatting
- Where
- Austria
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna