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ClinicalTrials.gov public records Last synced Jul 23, 2026, 1:33 AM EDT

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Showing 1–24 of 93 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Orthostatic Tachycardia Clear all
Not listed Not applicable Interventional Accepts healthy volunteers

Chemoreflex and Baroreflex Alterations Causing Postural Tachycardia Syndrome With Orthostatic Hyperpnea and Hypocapnia

NCT05923840
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Hypocapnia, Hyperventilation
Interventions
Chemoreflex Testing, Baroreflex testing, Orthostatic stress testing
Diagnostic Test
Lead sponsor
New York Medical College
Other
Eligibility
15 Years to 39 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Jul 23, 2026, 1:33 AM EDT
Active, not recruiting No phase listed Observational

Evaluating the Prevalence of Acute Hepatic Porphyria in Postural Tachycardia Syndrome

NCT05344599
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Acute Hepatic Porphyria
Interventions
Autonomic Function Testing, Genetic Testing, Urine Testing, Blood laboratory Testing
Diagnostic Test
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
70 participants
Timeline
2022 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 22, 2026 · Synced Jul 23, 2026, 1:33 AM EDT
Active, not recruiting Not applicable Interventional

Breathing Device in Postural Orthostatic Tachycardia Syndrome (POTS)

NCT00962728
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Postural Orthostatic Tachycardia Syndrome
Interventions
Inspiratory Threshold Device (Res-Q-Gard ITD), Sham Inspiratory Threshold Device
Device
Lead sponsor
Alfredo Gamboa
Other
Eligibility
18 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 21, 2025 · Synced Jul 23, 2026, 1:33 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Biospecimen Repository for Cardiac Arrhythmias at the Cleveland Clinic

NCT00921986
View directory record Official record
Conditions
Arrhythmias, Cardiac
Interventions
Not listed
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2035
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 9, 2025 · Synced Jul 23, 2026, 1:33 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

PET Scan in Patients With Neurocardiologic Disorders

NCT00001418
View directory record Official record
Conditions
Autonomic Nervous System Diseases
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
335 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1994 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jul 23, 2026, 1:33 AM EDT
Recruiting No phase listed Observational

Screening Study for KIT D816V Mutated Mast Cell Disease in Select Populations

NCT07143669
View directory record Official record
Conditions
Clonal Mast Cell Disease, KIT D816V Mutation, Suspected KITD816V Mutated Clonal Mast Cell Disease
Interventions
Screening
Other
Lead sponsor
Blueprint Medicines Corporation
Industry
Eligibility
18 Years and older
Enrollment
450 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
19
States / cities
Birmingham, Alabama • San Diego, California • Walnut Creek, California + 15 more
Source: ClinicalTrials.gov public record
Updated Jun 24, 2026 · Synced Jul 23, 2026, 1:33 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Sleep Actigraphy in Postural Tachycardia Syndrome (POTS)

NCT00692471
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Orthostatic Intolerance, Sleep Disorders
Interventions
Actigraphy Watch (motion sensors) with light sensors - ActiWatch from Minimitter
Device
Lead sponsor
Satish R. Raj
Other
Eligibility
18 Years to 65 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 7, 2025 · Synced Jul 23, 2026, 1:33 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Objective Sleep Disturbances in Orthostatic Intolerance

NCT00581022
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Chronic Orthostatic Intolerance
Interventions
Polysomnography
Procedure
Lead sponsor
Satish R. Raj
Other
Eligibility
18 Years to 65 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2016
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 9, 2018 · Synced Jul 23, 2026, 1:33 AM EDT
Active, not recruiting Not applicable Interventional

Phenotyping Mitochondrial and Immune Dysfunction in POTS With Targeted Clinical Intervention.

NCT05409651
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Time restricted eating
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Aug 19, 2024 · Synced Jul 23, 2026, 1:33 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Autoimmune Basis for Postural Tachycardia Syndrome

NCT05043051
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Vagal stimulation, Sham stimulation
Device
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 80 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 7, 2026 · Synced Jul 23, 2026, 1:33 AM EDT
Completed Not applicable Interventional

A Shared Medical Appointment Intervention for Quality of Life Improvement in POTS

NCT05454137
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
Shared medical appointment
Behavioral
Lead sponsor
University of Arizona
Other
Eligibility
21 Years to 79 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 4, 2025 · Synced Jul 23, 2026, 1:33 AM EDT
Recruiting Not applicable Interventional

Auricular Vagal Nerve Stimulation for Hypermobile Ehlers-Danlos Syndrome

NCT05212129
View directory record Official record
Conditions
Functional Gastrointestinal Disorders, Hypermobile Ehlers-Danlos Syndrome, Postural Orthostatic Tachycardia Syndrome, Autonomic Nervous System Disease, Autonomic Nervous System Imbalance
Interventions
Percutaneous vagal nerve stimulation (pVNS) device, Acoustic vagal nerve stimulation (aVNS) treatment
Device · Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
10 Years to 18 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Jul 23, 2026, 1:33 AM EDT
Not yet recruiting Not applicable Interventional

Development and Validation of the Kansas City Cardiac Dysautonomia Questionnaire (KCDysQ)

NCT06672861
View directory record Official record
Conditions
Cardiac Dysautonomia
Interventions
Kansas City Cardiac Dysautonomia Questionnaire (KCDysQ)
Other
Lead sponsor
Kansas City Heart Rhythm Research Foundation
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
3
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 27, 2025 · Synced Jul 23, 2026, 1:33 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Dopamine in Orthostatic Tolerance

NCT00748228
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
dietary sodium
Dietary Supplement
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 60 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 14, 2015 · Synced Jul 23, 2026, 1:33 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Autonomic Nervous System and Chronic Fatigue Syndrome

NCT00580619
View directory record Official record
Conditions
Chronic Fatigue Syndrome, Orthostatic Intolerance, Postural Tachycardia Syndrome
Interventions
Autonomic Function Testing, Saline infusions, L-NMMA trimethaphan, methyldopa
Other · Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 65 Years
Enrollment
170 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 17, 2017 · Synced Jul 23, 2026, 1:33 AM EDT
Terminated No phase listed Observational

Clinical Autonomic Disorders: A Training Protocol

NCT02154009
View directory record Official record
Conditions
Posttraumatic Stress Disorder, Pseudopheochromocytoma, Healthy Volunteers, Neurocardiogenic Syncope, Postural Tachycardia Syndrome
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
2 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2021
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 7, 2021 · Synced Jul 23, 2026, 1:33 AM EDT
Completed No phase listed Observational Results available

Gastrointestinal Symptoms in Postural Orthostatic Tachycardia Syndrome

NCT03263819
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Oral glucose tolerance test
Diagnostic Test
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
26 participants
Timeline
2017 – 2020
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 7, 2024 · Synced Jul 23, 2026, 1:33 AM EDT
Completed Phase 3 Interventional Results available

Effect of Ivabradine on Patients With Postural Orthostatic Tachycardia Syndrome

NCT03182725
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
Ivabradine, Placebo
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 65 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jun 28, 2021 · Synced Jul 23, 2026, 1:33 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Aldosterone & Sodium Regulation in Postural Tachycardia Syndrome - Screening

NCT01783288
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Autonomic Function Testing, Posture Study, Measurement of Total Blood Volume, Exercise Capacity Test
Other · Procedure
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Jul 23, 2026, 1:33 AM EDT
Recruiting Not applicable Interventional

The Long COVID-19 Wearable Device Study

NCT05741112
View directory record Official record
Conditions
Long COVID, Postural Orthostatic Tachycardia Syndrome, Dysautonomia, Myalgic Encephalomyelitis, Chronic Fatigue Syndrome, Long Covid19
Interventions
Wearable device
Device
Lead sponsor
Scripps Translational Science Institute
Other
Eligibility
18 Years and older
Enrollment
100,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated May 10, 2025 · Synced Jul 23, 2026, 1:33 AM EDT
Completed Not applicable Interventional

A Novel Noninvasive Thermoregulatory Device for Postural Tachycardia Syndrome

NCT04943276
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Embr Device
Device
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Oct 7, 2024 · Synced Jul 23, 2026, 1:33 AM EDT
Completed No phase listed Observational

Head Circumference Growth in Children With Ehlers-Danlos Syndrome Who Develop Dysautonomia Later in Life

NCT01367977
View directory record Official record
Conditions
Ehlers Danlos Syndrome, External Hydrocephalus, Dysautonomia, Postural Orthostatic Tachycardia Syndrome, Venous Insufficiency
Interventions
Not listed
Lead sponsor
Genetic Disease Investigators
Other
Eligibility
5 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Colleyville, Texas
Source: ClinicalTrials.gov public record
Updated Feb 13, 2024 · Synced Jul 23, 2026, 1:33 AM EDT
Recruiting Phase 2 Interventional

A Study of Pyridostigmine in Postural Tachycardia Syndrome

NCT00409435
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
pyridostigmine, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
15 Years to 55 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 4, 2026 · Synced Jul 23, 2026, 1:33 AM EDT
Completed Not applicable Interventional

Programming Aquatic Therapy for POTS

NCT07182578
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome (POTS)
Interventions
Aquatic Occupational Therapy
Other
Lead sponsor
California State University, Dominguez Hills
Other
Eligibility
18 Years to 65 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Long Beach, California
Source: ClinicalTrials.gov public record
Updated Apr 2, 2026 · Synced Jul 23, 2026, 1:33 AM EDT