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Showing 25–42 of 18 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Cardiac Dysautonomia Clear all
Completed Not applicable Interventional Results available

Cardioneuroablation for Neurocardiogenic Syncope

NCT02009982
View directory record Official record
Conditions
Neurocardiogenic Syncope, Vasovagal Syncope
Interventions
Cardioneuroablation, Biosense Webster Navistar ThermoCool Diagnostic/Ablation Deflectable Tip Catheter
Procedure · Device
Lead sponsor
David B. De Lurgio
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
2
States / cities
Atlanta, Georgia • Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 3, 2016 · Synced Jul 22, 2026, 8:17 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Cereset Research For Chronic Nausea

NCT05229107
View directory record Official record
Conditions
Nausea, Gastroparesis, Stress, Anxiety, Hyperarousal, Quality of Life, Vomiting, Heart Rate Variability
Interventions
Cereset Research
Device
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 11, 2024 · Synced Jul 22, 2026, 8:17 PM EDT
Active, not recruiting Early Phase 1 Interventional

Modafinil and Cognitive Function in POTS

NCT01988883
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Placebo, Modafinil, Propranolol
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 14, 2026 · Synced Jul 22, 2026, 8:17 PM EDT
Terminated Phase 2 Interventional Results available

Ivabradine in the Management of Cardiac Autonomic Dysfunction Associated With Thoracic Radiation Therapy.

NCT03137537
View directory record Official record
Conditions
Lymphoma, Autonomic Imbalance, Cancer Survivorship
Interventions
Ivabradine, Placebo Oral Tablet
Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years to 80 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
3
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 9, 2022 · Synced Jul 22, 2026, 8:17 PM 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 7, 2025 · Synced Jul 22, 2026, 8:17 PM 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 7, 2025 · Synced Jul 22, 2026, 8:17 PM EDT
Active, not recruiting No phase listed Observational

BAsel Syncope EvaLuation (BASEL IX) Study

NCT01548352
View directory record Official record
Conditions
Syncope
Interventions
Not listed
Lead sponsor
University Hospital, Basel, Switzerland
Other
Eligibility
40 Years and older
Enrollment
3,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 14, 2025 · Synced Jul 22, 2026, 8:17 PM EDT
Enrolling by invitation Not applicable Interventional

SHADES Mechanistic Trial

NCT06041581
View directory record Official record
Conditions
Insomnia, Insomnia Chronic, Insomnia, Primary, Sleep Disturbance, Sleep Disorder, Cardiovascular Diseases, Heart Diseases, Coronary Artery Disease, Stroke, Autonomic Dysfunction, Systemic Inflammatory Response, Metabolic Disease
Interventions
Sleep Healthy Using The Internet (SHUTi), Telephonic CBT-I, Face-to-Face CBT-I, Active Control: Sleep Education/Hygiene, Symptom Monitoring, and Usual Primary Care
Behavioral · Other
Lead sponsor
Indiana University
Other
Eligibility
40 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jul 13, 2025 · Synced Jul 22, 2026, 8:17 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Autoimmune Basis for Postural Tachycardia Syndrome

NCT02725060
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Postural Tachycardia Syndrome, Tachycardia, Arrhythmias, Cardiac, Autonomic Nervous System Diseases, Orthostatic Intolerance, Cardiovascular Diseases, Primary Dysautonomias
Interventions
phenylephrine, isoproterenol, 25 micro-Ci of radiation, Posture study with blood samples, 24-hour heart rhythm and blood pressure monitoring, Quantitative Axonal Sudomotor Reflex Testing, Autonomic function tests, Rebreathing test, Assessment of splanchnic capacitance, microneurography
Drug · Radiation · Procedure + 1 more
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 50 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2026
U.S. locations
2
States / cities
Oklahoma City, Oklahoma • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 11, 2025 · Synced Jul 22, 2026, 8:17 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

PD2i Analysis of Heart Rate Variability in Competitive Sports

NCT01249248
View directory record Official record
Conditions
Autonomic Dysfunction
Interventions
PD2i Analyzer
Device
Lead sponsor
University of Mississippi Medical Center
Other
Eligibility
18 Years to 40 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated Apr 11, 2012 · Synced Jul 22, 2026, 8:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Dietary Sodium's Effect on Urinary Sodium and Dopamine Excretion in Patients With Postural Tachycardia Syndrome

NCT01563107
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
Plasma Volume, Exercise Capacity Test - Bicycle, Posture Study
Radiation · Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2020
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 24, 2022 · Synced Jul 22, 2026, 8:17 PM 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 7, 2025 · Synced Jul 22, 2026, 8:17 PM 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 5, 2025 · Synced Jul 22, 2026, 8:17 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

Hemodynamic Response of Neuropathic And Non-Neuropathic POTS Patients To Adrenoreceptor Agonist And Antagonist

NCT03070730
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Orthostatic Intolerance
Interventions
Droxidopa, Atenolol, Placebos
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 55 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 17, 2017 · Synced Jul 22, 2026, 8:17 PM EDT
Terminated Phase 3 Interventional Results available

Clinical Importance of Treating Iron Overload in Sickle Cell Disease

NCT00981370
View directory record Official record
Conditions
Anemia, Sickle Cell, Transfusion Hemosiderosis
Interventions
deferasirox
Drug
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
14 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Jul 22, 2026, 8:17 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Clinical Translation of 18F-Labeled Hydroxyphenethylguanidines

NCT02385877
View directory record Official record
Conditions
Autonomic Peripheral Nervous System Diseases
Interventions
[18F]4F-MHPG, [18F]3F-PHPG
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 55 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jul 22, 2026, 8:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Advancing Understanding of Transportation Options

NCT04141891
View directory record Official record
Conditions
Diabetic Retinopathy, Macular Degeneration, Glaucoma, Retinitis Pigmentosa, Vision Disorders, Acute Coronary Syndrome, Implantable Defibrillator User, Congestive Heart Failure, Hypertrophic Obstructive Cardiomyopathy, Orthostatic Hypotension, Syncope, Presyncope, Narcolepsy, Dementia, Multiple Sclerosis, Parkinson Disease, Brain Injuries, Spinal Cord Injuries, Stroke, Vertigo, Dizziness, Seizures, Substance Use, Insulin Dependent Diabetes Mellitus, Arthritis, Foot--Abnormalities, Chronic Obstructive Pulmonary Disease, Obstructive Sleep Apnea, End Stage Renal Disease, Sleep Apnea, Insomnia, Restless Legs Syndrome
Interventions
Driving Decision Aid, Older Drivers Website
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
529 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
3
States / cities
La Jolla, California • Aurora, Colorado • Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Jul 22, 2026, 8:17 PM EDT
Active, not recruiting Phase 2 Interventional

Adrenergic Blockers for Cardiac Changes in Early Parkinson's Disease (Protocol 53136)

NCT03775096
View directory record Official record
Conditions
REM Sleep Behavior Disorder, Pre-motor Parkinson Disease, Symptomatic Parkinson Disease
Interventions
Carvedilol
Drug
Lead sponsor
Michele Tagliati, MD
Other
Eligibility
50 Years to 85 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 1, 2026 · Synced Jul 22, 2026, 8:17 PM EDT