Clinical trials: Orthostatic Intolerance
Tachycardia, Chronic Orthostatic Intolerance
Treatment of Orthostatic Intolerance
This trial is designed to study the effects of various mechanistically unique medications in controlling excessive increases in heart rate with standing and in improving the symptoms of orthostatic intolerance in patients with…
- Trial name
- NCT00262470
- Testing
- Acetazolamide, Atomoxetine, NO Drug
- Where
- United States
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Satish R. Raj
Postural Tachycardia Syndrome, Orthostatic Tachycardia
Acute Salt Handling in Orthostatic Intolerance
The investigators will test the hypothesis that patients with chronic orthostatic intolerance or postural orthostatic tachycardia syndrome (OI or POTS) will be unable to conserve urinary sodium as compared to healthy control…
- Conditions
- Postural Tachycardia Syndrome, Orthostatic Tachycardia, Orthostatic Intolerance
- Trial name
- NCT00581633
- Testing
- normal saline (0.9%)
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University
Postural Tachycardia Syndrome, Orthostatic Intolerance
Sleep Actigraphy in Postural Tachycardia Syndrome (POTS)
We propose to use actigraphy (measured by activity watches) as a tool to quantify sleep disturbances in patients with orthostatic intolerance compared with healthy control subjects.
- Conditions
- Postural Tachycardia Syndrome, Orthostatic Intolerance, Sleep Disorders
- Trial name
- NCT00692471
- Testing
- Actigraphy Watch (motion sensors) with light sensors - ActiWatch from Minimitter
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Satish R. Raj
Postural Tachycardia Syndrome
Intravenous (IV) Saline and Exercise in Postural Tachycardia Syndrome (POTS)
The investigators will test whether an intravenous infusion of saline (salt water) will improve the exercise capacity in patients with postural tachycardia syndrome (POTS).
- Trial name
- NCT01000350
- Testing
- Saline
- Where
- United States
- Volunteers
- 40 people
- Sponsor
- Vanderbilt University Medical Center
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
ME/CFS, Long COVID
LIFT: Life Improvement Trial
The LIFT will be conducted at Brigham and Women's Hospital (BWH) of Harvard Medical School, focusing on the effect of Pyridostigmine (Mestinon) and Low-Dose Naltrexone (LDN) in subjects aged 18-70 meeting the Canadian consensus…
- Conditions
- ME/CFS, Long COVID, PASC
- Trial name
- LIFT (NCT06366724)
- Testing
- Pyridostigmine, Low-Dose Naltrexone
- Where
- United States
- Volunteers
- 160 people
- Sponsor
- Brigham and Women's Hospital
Tachycardia, Postural Orthostatic Tachycardia Syndrome
Pathophysiology of Orthostatic Intolerance
The purpose of this study is to describe the mechanism of orthostatic intolerance, relying on cardiovascular physiological studies.
- Trial name
- NCT00608725
- Testing
- DAXOR, QSweat, Intrinsic Heart Rate
- Where
- United States
- Volunteers
- 260 people, healthy volunteers welcome
- Sponsor
- Satish R. Raj
Postural Orthostatic Tachycardia Syndrome (POTS), Dysautonomia
Guanfacine and Cromolyn Sodium for POTS: The DBPOTS Trial
The goal of this clinical trial is to learn whether guanfacine or cromolyn sodium can improve symptoms and physical functioning in adults with Postural Orthostatic Tachycardia Syndrome (POTS).
- Conditions
- Postural Orthostatic Tachycardia Syndrome (POTS), Dysautonomia, Orthostatic Intolerance, Autonomic Nervous System Diseases
- Trial name
- DBPOTS (NCT07757555)
- Testing
- Guanfacine (GFC), Cromolyn Sodium
- Where
- United States
- Volunteers
- 25 people
- Sponsor
- Johns Hopkins University
Long COVID, POTS - Postural Orthostatic Tachycardia Syndrome
Long COVID Immune Profiling
Parasympathetic nervous system (PNS) is part of the body's autonomic nervous system(PNS) protects body against inflammation. Study shows that reduced PNS function activity is associated with persistent inflammation.
- Conditions
- Long COVID, POTS - Postural Orthostatic Tachycardia Syndrome, Autonomic Dysfunction
- Trial name
- NCT06027255
- Testing
- IL-6, cytokines (IL-17, and IFN-ɣ), Compass 31
- Where
- United States
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University Medical Center
POTS - Postural Orthostatic Tachycardia Syndrome
The Effect of Physical Activity on Postural Orthostatic Tachycardia Syndrome
Postural orthostatic tachycardia syndrome (POTS) is a disorder of unknown origin characterized by orthostatic intolerance and increased heart rate (HR) of ≥ 30 beats/minute during orthostasis in the absence of orthostatic…
- Trial name
- POTS (NCT05554107)
- Testing
- Training program
- Where
- Sweden
- Volunteers
- 200 people
- Sponsor
- Lund University
Postural Orthostatic Tachycardia Syndrome (POTS)
Study of Natriuretic Peptide Receptor 1 (NPR1) Antagonist in Adult Patients With Postural Orthostatic Tachycardia Syndrome (POTS)
This study is researching an experimental drug called REGN7544 (called "study drug"). The study is focused on participants with POTS. The aim of the study is to see how safe, tolerable, and effective the study drug is.
- Trial name
- PINNACLE (NCT06593600)
- Testing
- REGN7544
- Where
- 16 sites in United States, Canada
- Volunteers
- 82 people
- Sponsor
- Regeneron Pharmaceuticals
Orthostatic Hypotension, Heart Rate
Effects of Breathing Retraining Exercises in Pregnant Females With Postural Orthostatic Tachycardia Syndrome.
Postural orthostatic tachycardia POTS is characterized by excessive increase in heart rate when moving from lying to standing position, often accompanied by symptoms such as dizziness, fatigue, brain fog, lightheadedness, rapid…
- Conditions
- Orthostatic Hypotension, Heart Rate, Blood Pressure
- Trial name
- NCT07579026
- Testing
- diaphragmatic breathing exercise, educational retraining
- Where
- Pakistan
- Volunteers
- 44 people
- Sponsor
- Riphah International University
Postural Tachycardia Syndrome, Orthostatic Intolerance
Hypercapnia and Orthostatic Tolerance in Postural Orthostatic Tachycardia Syndrome
The mechanism behind postural orthostatic tachycardia syndrome (POTS) involves many causes including a sympathetic nervous system problem.
- Trial name
- NCT04271878
- Testing
- RespirAct™ system (Thornhill Research Inc., Toronto, Canada)
- Where
- Canada
- Volunteers
- 26 people
- Sponsor
- University of Calgary
Sarcopenia, Fatigue
Association Between Sarcopenia, Fatigue and Orthostatic Intolerance in Geriatric Patients: A Case Control Study
This study aims to explore the relationship between sarcopenia, fatigue, and orthostatic intolerance in older adults. It will be conducted among geriatric patients attending Ain Shams University Hospitals.
- Conditions
- Sarcopenia, Fatigue, Orthostatic Intolerance
- Trial name
- NCT07564830
- Where
- Egypt
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Ain Shams University
Orthostatic Intolerance
Effects of Age, Sex and Isometric Exercise on Ventricular-Vascular Interactions During Cardiac Unloading
As people get older, especially women, they often feel dizzy or even faint when they go from sitting or lying down to standing up.
- Trial name
- Unload heart (NCT06939153)
- Testing
- LBNP, LBNP + Isometric handgrip exercise
- Where
- United States
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Tracy Baynard
Syncope, Vasovagal, Postural Orthostatic Tachycardia Syndrome
Paediatric Syncope in the Emergency Department
The investigators will assess the efficacy of clinically recommended counterpressure maneuvers (CPM) in preventing syncope for paediatric patients.
- Conditions
- Syncope, Vasovagal, Postural Orthostatic Tachycardia Syndrome, Orthostatic Intolerance
- Trial name
- DETECT-ED (NCT05555771)
- Testing
- Counterpressure Maneuvers, Usual Care
- Where
- Canada
- Volunteers
- 300 people
- Sponsor
- Dr. Victoria Claydon
Syncope, Vasovagal, Postural Orthostatic Tachycardia Syndrome
Postural Sway and Counterpressure Maneuvers for Pediatric Syncope
The investigators are interested in whether discrete counterpressure maneuvers, or muscle movements in the lower body, will boost blood pressure and cardiovascular control in children who faint.
- Conditions
- Syncope, Vasovagal, Postural Orthostatic Tachycardia Syndrome, Orthostatic Intolerance
- Trial name
- NCT05633693
- Testing
- Counterpressure Maneuvers, Baseline Stand
- Where
- Canada
- Volunteers
- 30 people
- Sponsor
- Simon Fraser University
Postural Orthostatic Tachycardia Syndrome, Chronic Orthostatic Intolerance
Using Mirabegron to Increase BP in Patients With POTS
This is a pilot dose-finding study to test the hypothesis that mirabegron increases systolic blood pressure (BP), prevents syncope/presyncope, and improves the quality of life (QOL), functional capacity, chest pain, and…
- Conditions
- Postural Orthostatic Tachycardia Syndrome, Chronic Orthostatic Intolerance, Syncope
- Trial name
- RAISE-BP (NCT06133075)
- Testing
- Mirabegron 50 MG, Mirabegron 25 MG
- Where
- United States
- Volunteers
- 20 people
- Sponsor
- Cedars-Sinai Medical Center
Autonomic Dysfunction, Orthostatic Intolerance
Continuous and Non-invasive Measurements by Task Force® CORE/CARDIO in Autonomic Function Testing (AFT)
Background: The investigational device, "Task Force® CORE" (TFC, CNSystems Medizintechnik GmbH, Graz, Austria) together with the "Task Force® CARDIO" (TFCARDIO, CNSystems Medizintechnik GmbH, Graz, Austria) medical device…
- Trial name
- NCT05977335
- Testing
- Autonomic Function Testing
- Volunteers
- 75 people
- Sponsor
- CNSystems Medizintechnik GmbH
Postural Tachycardia Syndrome
Modafinil and Cognitive Function in POTS
A common complaint among patients with Postural Tachycardia Syndrome (POTS) is "brain fog" or difficulty concentrating. This problem is poorly understood.
- Trial name
- NCT01988883
- Testing
- Modafinil, Propranolol
- Where
- United States
- Volunteers
- 20 people
- Sponsor
- Vanderbilt University Medical Center