Clinical trials: Orthostatic Intolerance
Vasovagal Syncope (VVS), Presyncope
A Warning Red Flag Classification System to Predict Risk of Vasovagal Event During Office Hysteroscopy
The goal of this pilot cross sectional study is to identify participants at risk of vasovagal reaction/syncope(VVR/VVS) during office hysteroscopy.
- Trial name
- FLAG-VS (NCT07030218)
- Testing
- Office hysteroscopy
- Where
- India
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Tanvir Hospital
Postural Tachycardia Syndrome (POTS)
Effect of Dietary Sodium Intake on Vascular Endothelium
The investigators will test the hypothesis that markers of vascular endothelial dysfunction will be exaggerated acutely with an extreme high sodium diet compared to an extreme low-sodium diet.
- Trial name
- NCT01550315
- Testing
- Pulsitile Arterial Tonometry (PAT) Protocol, Calf Blood Flow in Reactive Hyperemia (CBF-RH), Evaluation of Forearm-Mediated Dilation
- Where
- United States
- Volunteers
- 27 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University Medical Center
Syncope, Vasovagal
Cardioneuroablation for Reflex Syncope and Exercise Capacity
Cardioneuroablation (CNA) is a new promising method to treat reflex syncope which is due to vagally-induced functional sinus arrest or atrio-ventricular block (AVB).
- Trial name
- Roman3 (NCT06440291)
- Testing
- Cardioneuroablation
- Where
- Poland
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Centre of Postgraduate Medical Education
Diabetic Retinopathy, Macular Degeneration
Advancing Understanding of Transportation Options
This Stage II randomized, controlled, longitudinal trial seeks to assess the acceptability, feasibility, and effects of a driving decision aid use among geriatric patients and providers.
- Conditions
- Diabetic Retinopathy, Macular Degeneration, Glaucoma, Retinitis Pigmentosa
- Trial name
- AUTO (NCT04141891)
- Testing
- Driving Decision Aid, Older Drivers Website
- Where
- 3 sites in United States
- Volunteers
- 529 people, healthy volunteers welcome
- Sponsor
- University of Colorado, Denver
Orthostatic Intolerance
Sex Hormones and Orthostatic Tolerance
This study is designed to determine the causes of "orthostatic intolerance" which occurs more commonly in women than in men. Orthostatic tolerance is the ability to remain standing up right for long periods of time, or to avoid…
- Trial name
- NCT01153581
- Testing
- Ganirelix acetate, 17β-Oestradiol, Progesterone
- Where
- United States
- Volunteers
- 109 people, healthy volunteers welcome
- Sponsor
- Yale University
Postural Tachycardia Syndrome
POTS NET mRNA Functional Correlation With NET Activity
DNA Acetylation can be responsible for significant down-regulation of transcription of the Norepinephrine Transporter (NET). NET is an important clearance transporter that removes norepinephrine (NE) from sympathetic neuronal…
- Trial name
- NCT03218761
- Testing
- NET mRNA level, Plasma catechols, Urine Catechols
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University Medical Center
Orthostatic Hypotension, Syncope
The Effect of Water Carbonation on Orthostatic Tolerance
The primary purpose of this investigation is to determine whether water carbonation can improve orthostatic tolerance in healthy control volunteers.
- Conditions
- Orthostatic Hypotension, Syncope, Vasovagal Syncope
- Trial name
- NCT05621460
- Testing
- 500mL carbonated water, 500mL still water, 50mL still water
- Where
- Canada
- Volunteers
- 25 people, healthy volunteers welcome
- Sponsor
- Simon Fraser University
Postexercise Hypotension
Histamine as a Molecular Transducer of Adaptation to Exercise
This study is investigating the role of histamine in generating adaptation to exercise
- Trial name
- NCT05206227
- Testing
- Aerobic Exercise, alpha-FMH, Resistance and Aerobic Exercise
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- University of Oregon
Postural Orthostatic Tachycardia Syndrome
Cardiovascular Effects of Selective I(f)-Channel Blockade
The study compares three treatment modalities in a human model of Postural orthostatic tachycardia syndrome (POTS): beta-blockers, I(f)-blockers, and placebo.
- Trial name
- NCT00865917
- Testing
- beta-blocker (Metoprolol), I(f)-blocker (ivabradine)
- Where
- 2 sites in Germany
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Hannover Medical School
Postural Tachycardia Syndrome
fMRI in Postural Tachycardia Syndrome
Postural tachycardia syndrome (POTS) is one of the most common forms of chronic orthostatic intolerance in the United States. This is a disabling disorder characterized by an excessive increase in heart rate upon standing that is…
- Trial name
- POTS (NCT04137757)
- Testing
- Lower Body Negative Pressure
- Where
- United States
- Volunteers
- 21 people, healthy volunteers welcome
- Sponsor
- Milton S. Hershey Medical Center
Postural Orthostatic Tachycardia Syndrome (POTS), Fibromyalgia (FM)
Auto-immune Contribution in Symptom-based Sensory and Autonomic Disorders
Postural Orthostatic Tachycardia Syndrome (PoTS) is a condition where the heart rate increases when standing up, causing symptoms like dizziness and fainting.
- Trial name
- ACSSAD (NCT06992531)
- Testing
- Questionnaire and Physical Exam, Nerve conduction studies, Microneurography
- Volunteers
- 250 people, healthy volunteers welcome
- Sponsor
- King's College London
Heart Rate Response, Orthostasis
An Investigation of Heart Rate Recovery Responses to Repeated Active Stand Protocols
Study background: Impaired heart rate recovery following active stand is associated with morbidity and mortality. Evidence for the repeatability of this measure is limited.
- Trial name
- NCT04921059
- Testing
- Active Stand
- Where
- Ireland
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Caitríona Quinn
Postural Orthostatic Tachycardia Syndrome
Assessment of Antibodies and Inflammatory Markers in Postural Tachycardia Syndrome
In this pilot study, the investigators will test the hypothesis that patients with postural tachycardia syndrome will have an elevated percentage of functional antibodies to adrenergic receptors compared with control subjects…
- Trial name
- NCT02196376
- Testing
- History, Physical, blood draw
- Where
- United States
- Volunteers
- 212 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University
Spinal Cord Injury, Autonomic Dysreflexia
Treatment of Post-SCI Hypotension
While treatment strategies for OH have been identified for use in persons with acute SCI, the field of SCI medicine lacks a gold standard for treatment thresholds and well-defined outcome parameters.
- Conditions
- Spinal Cord Injury, Autonomic Dysreflexia, Orthostatic Hypotension, Baroreceptor Integrity
- Trial name
- NCT02919917
- Testing
- Midodrine Hydrochloride
- Where
- 2 sites in United States
- Volunteers
- 66 people, healthy volunteers welcome
- Sponsor
- James J. Peters Veterans Affairs Medical Center
Hypotension, Orthostatic, Hypertension
Effects of Melatonin to Reduce Nocturnal Hypertension in Patients With Neurogenic Orthostatic Hypotension
Neurogenic Orthostatic Hypotension (NOH) is clinically defined as a consistent drop in systolic blood pressure (SBP) ≥30mmHg upon standing from a seated or lying position.
- Conditions
- Hypotension, Orthostatic, Hypertension, Autonomic Nervous System Diseases
- Trial name
- NCT02963181
- Testing
- Yohimbine, Melatonin
- Where
- Canada
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's
Postural Orthostatic Tachycardia Syndrome, Postural Tachycardia Syndrome
Autoimmune Basis for Postural Tachycardia Syndrome
The purpose of this study is to see if some people with postural tachycardia syndrome (POTS) have higher levels of immune proteins (autoantibodies) directed against receptors of the autonomic nervous system, and if these…
- Conditions
- Postural Orthostatic Tachycardia Syndrome, Postural Tachycardia Syndrome, Tachycardia, Arrhythmias, Cardiac
- Trial name
- NCT02725060
- Testing
- phenylephrine, isoproterenol, 25 micro-Ci of radiation
- Where
- 2 sites in United States
- Volunteers
- 58 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University Medical Center
Hypertension
Postexercise Hypotension and Exercise Adherence
Sedentary (n=24) adults ≥18 yr with elevated BP to established hypertension were enrolled into this randomized clinical trial entitled, 'Blood Pressure UtiLizing Self-Monitoring after Exercise study or PULSE'.
- Trial name
- NCT03780309
- Testing
- Exercise Self-Monitoring, Blood Pressure Self-Monitoring
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- University of Connecticut
Orthostatic Hypotension, Nondipping Hypertension
Is Orthostatic Hypotension Associated With Nondipping Hypertension
The aim of the study is to evaluate whether orthostatic hypotension is associated with nondipping hypertension. Methods and patients: 400 subjects who are referred for 24hABPM will be filled questioner regarding their medical…
- Trial name
- NCT00491231
- Where
- Israel
- Volunteers
- 400 people, healthy volunteers welcome
- Sponsor
- Sheba Medical Center
Postural Tachycardia Syndrome, Autonomic Dysfunction
Non-invasive Vagal Neurostimulation (nVNS) in Adolescents With Postural Orthostatic Tachycardia Syndrome (POTS)
The purpose of this study is to determine if nVNS will decrease autonomic symptom intensity (COMPASS-31 and Child Functional Disability Inventory) in adolescent patients with postural orthostatic tachycardia syndrome (POTS) in…
- Conditions
- Postural Tachycardia Syndrome, Autonomic Dysfunction, Postural Orthostatic Tachycardia Syndrome, POTS - Postural Orthostatic Tachycardia Syndrome
- Trial name
- NCT06268288
- Testing
- GammaCore intervention, STEPS management protocol
- Where
- 2 sites in United States
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
Mitochondrial Diseases, Myalgic Encephalomyelitis Chronic Fatigue Syndrome
The Precision Mito- Mito Map COMPASS Study
Mito Map is a research tool that produces an Energy Score from information provided by a participant. This remote observational study has an initial enrollment target of 400 adults across seven prespecified cohorts: healthy…
- Conditions
- Mitochondrial Diseases, Myalgic Encephalomyelitis Chronic Fatigue Syndrome, Post-COVID-19 Condition, Postural Orthostatic Tachycardia Syndrome
- Trial name
- COMPASS (NCT07856121)
- Testing
- Mito Map Energy Score and Home Functional Assessments
- Where
- United States
- Volunteers
- 400 people, healthy volunteers welcome
- Sponsor
- AI Agent Vault, Inc. d/b/a Precision Mito