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ClinicalTrials.gov public records Last synced Oct 2, 2026, 4:55 AM EDT

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Showing 25–48 of 94 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Orthostatic Tachycardia Clear all
Active, not recruiting Early Phase 1 Interventional

Autonomic Determinants of POTS - Pilot 2

NCT04140721
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Placebo oral tablet, Moxonidine Pill
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 27, 2026 · Synced Oct 2, 2026, 4:55 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Pathophysiology of Orthostatic Intolerance

NCT00608725
View directory record Official record
Conditions
Tachycardia, Postural Orthostatic Tachycardia Syndrome
Interventions
DAXOR, QSweat, Intrinsic Heart Rate
Radiation · Procedure · Drug
Lead sponsor
Satish R. Raj
Other
Eligibility
18 Years to 80 Years
Enrollment
260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1996 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 8, 2025 · Synced Oct 2, 2026, 4:55 AM EDT
Recruiting No phase listed Observational

Inappropriate Sinus Tachycardia Registry

NCT05107635
View directory record Official record
Conditions
Inappropriate Sinus Tachycardia, Postural Tachycardia Syndrome
Interventions
AtriCure Commercially Available Devices
Device
Lead sponsor
AtriCure, Inc.
Industry
Eligibility
18 Years to 100 Years
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
12
States / cities
Loma Linda, California • Palo Alto, California • Redwood City, California + 9 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Oct 2, 2026, 4:55 AM EDT
Not listed Phase 4 Interventional

Ivabradine for Long-Term Effects of COVID-19 With POTS Cohort

NCT05481177
View directory record Official record
Conditions
Long Haul COVID, Postural Orthostatic Tachycardia Syndrome
Interventions
Ivabradine
Drug
Lead sponsor
Uniformed Services University of the Health Sciences
Federal
Eligibility
18 Years to 80 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 29, 2023 · Synced Oct 2, 2026, 4:55 AM EDT
Active, not recruiting Not applicable Interventional

Intravenous (IV) Saline and Exercise in Postural Tachycardia Syndrome (POTS)

NCT01000350
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Saline, Placebo
Drug · Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2028
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 8, 2025 · Synced Oct 2, 2026, 4:55 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Autonomic Determinants of POTS - Pilot1

NCT04050410
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Moxonidine, Placebo
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 27, 2026 · Synced Oct 2, 2026, 4:55 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
750 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
22
States / cities
Birmingham, Alabama • San Diego, California • Walnut Creek, California + 18 more
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Oct 2, 2026, 4:55 AM EDT
Not yet recruiting Not applicable Interventional

Ultrasound Guided Stellate Ganglion Block in Postural Tachycardia Syndrome

NCT06953661
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Stellate ganglion block, Sham injection of saline, Ropivacaine, Normal saline
Procedure · Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
2
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Oct 15, 2025 · Synced Oct 2, 2026, 4:55 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Peripheral Dopamine in Postural Tachycardia Syndrome

NCT00685919
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Orthostatic Intolerance
Interventions
Carbidopa, Placebo
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 60 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2021
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 24, 2022 · Synced Oct 2, 2026, 4:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Standing Cognition and Co-morbidities of POTS Evaluation

NCT03602482
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Ehlers-Danlos Syndrome
Interventions
Standing, Supine
Behavioral
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
13 Years to 60 Years
Enrollment
139 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 14, 2021 · Synced Oct 2, 2026, 4:55 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Assessment of Antibodies and Inflammatory Markers in Postural Tachycardia Syndrome

NCT02196376
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
History, Physical, blood draw, Questionnaires
Other · Behavioral
Lead sponsor
Vanderbilt University
Other
Eligibility
13 Years to 80 Years
Enrollment
212 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 10, 2025 · Synced Oct 2, 2026, 4:55 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Cardiovagal Baroreflex Deficits Impair Neurovascular Coupling and Cognition in POTS

NCT03261570
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome (POTS), POTS, Orthostatic Intolerance
Interventions
Pyridostigmine, Digoxin, Placebo
Drug
Lead sponsor
New York Medical College
Other
Eligibility
15 Years to 30 Years · Female only
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated Sep 28, 2022 · Synced Oct 2, 2026, 4:55 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 28, 2025 · Synced Oct 2, 2026, 4:55 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Treatment of Orthostatic Intolerance

NCT00262470
View directory record Official record
Conditions
Tachycardia, Chronic Orthostatic Intolerance
Interventions
Acetazolamide, Atomoxetine, NO Drug, Clonidine, Entacapone, Entacapone & Propranolol, Atomoxetine & Propranolol, Indomethacin, Mecamylamine, Isosorbide Dinitrate, Melatonin, Midodrine, Modafinil, Octreotide, Placebo, Propranolol, Modafinil & Propranolol, Sertraline, IV Saline, Drinking Water, Breathing Device, memantine, Abdominal binder
Drug · Other · Dietary Supplement + 3 more
Lead sponsor
Satish R. Raj
Other
Eligibility
18 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 8, 2025 · Synced Oct 2, 2026, 4:55 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Renal Salt Handling in Postural Tachycardia Syndrome Following Dietary Dopa Administration

NCT01064739
View directory record Official record
Conditions
Healthy Participants
Interventions
Fava beans, Fixed Sodium Diet
Dietary Supplement · Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 60 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 26, 2016 · Synced Oct 2, 2026, 4:55 AM EDT
Recruiting Phase 2 Interventional

Restoring Iron Deficiency in POTS

NCT07197905
View directory record Official record
Conditions
POTS - Postural Orthostatic Tachycardia Syndrome
Interventions
Intravenous iron
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 11, 2025 · Synced Oct 2, 2026, 4:55 AM EDT
Completed 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 Jul 29, 2026 · Synced Oct 2, 2026, 4:55 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 Sep 28, 2026 · Synced Oct 2, 2026, 4:55 AM EDT
Completed Not applicable Interventional

VNS for Long-COVID-19

NCT05630040
View directory record Official record
Conditions
Post-COVID-19 Syndrome, Postural Tachycardia Syndrome, Dysautonomia
Interventions
Non-invasive vagus nerve stimulation, Sham Intervention
Device
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 8, 2024 · Synced Oct 2, 2026, 4:55 AM EDT
Terminated Phase 2 Interventional Results available

Open Label Extension of Efgartigimod in Adults With Post-COVID-19 POTS

NCT05918978
View directory record Official record
Conditions
Post-COVID Postural Orthostatic Tachycardia Syndrome Postural Orthostatic Tachycardia Syndrome
Interventions
Efgartigimod
Drug
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
9
States / cities
La Jolla, California • Palo Alto, California • Glenview, Illinois + 6 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2025 · Synced Oct 2, 2026, 4:55 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Acute Salt Handling in Orthostatic Intolerance

NCT00581633
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Orthostatic Tachycardia, Orthostatic Intolerance
Interventions
normal saline (0.9%)
Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 6, 2025 · Synced Oct 2, 2026, 4:55 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Cardiovascular Autonomic and Immune Mechanism of Post COVID-19 Tachycardia Syndrome

NCT05421208
View directory record Official record
Conditions
Post-acute COVID-19 Syndrome, Postural Tachycardia Syndrome (POTS), Long COVID, SARS CoV 2 Infection
Interventions
Levels of inflammatory cytokine ( IL-6) in post-COVID-19 POTS and controls, Levels of inflammatory cytokine ( IL-6) in controls, Effect on inflammation after chronic PNS stimulation
Diagnostic Test
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 15, 2026 · Synced Oct 2, 2026, 4:55 AM EDT
Active, not recruiting Not applicable Interventional

Transdermal Vagal Stimulation for POTS

NCT02281097
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
Stimulation, Placebo
Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 75 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 27, 2026 · Synced Oct 2, 2026, 4:55 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Long COVID Immune Profiling

NCT06027255
View directory record Official record
Conditions
Long COVID, POTS - Postural Orthostatic Tachycardia Syndrome, Autonomic Dysfunction
Interventions
IL-6, cytokines (IL-17, and IFN-ɣ), Compass 31
Diagnostic Test · Behavioral
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 25, 2026 · Synced Oct 2, 2026, 4:55 AM EDT