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ClinicalTrials.gov public records Last synced Oct 22, 2026, 10:59 PM EDT

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Showing 1–24 of 48 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Sympathetic Activity Clear all
Active, not recruiting Phase 4 Interventional

L-arginine to Reduce Sympathetic Nerve Activity in CKD Patients

NCT03982160
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
L-Arginine, Placebo
Drug · Other
Lead sponsor
The University of Texas at Arlington
Other
Eligibility
35 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
2
States / cities
Newark, Delaware • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jun 18, 2026 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Spinal Cord Stimulation for Restless Legs Syndrome

NCT03539081
View directory record Official record
Conditions
Restless Legs Syndrome, Neuropathic Pain
Interventions
Dual-energy X-ray absorptiometry Scan, Laboratory Measurements, Blood Flow Measurement, Continuous Blood Pressure, Partial pressure of oxygen, Microneurography, Anthropometric Measurements, John Hopkins Restless Legs Severity Scale, Continuous Blood Pressure Diary
Diagnostic Test · Other · Behavioral
Lead sponsor
Marshall Holland
Other
Eligibility
18 Years to 85 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Sep 21, 2023 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Vaporized Nicotine and Autonomic Control

NCT04613609
View directory record Official record
Conditions
Electronic Cigarette Use
Interventions
Electronic Cigarette containing nicotine, Electronic Cigarette without nicotine
Device
Lead sponsor
Michigan Technological University
Other
Eligibility
21 Years to 40 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Houghton, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 3, 2020 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Mindfulness and Neural Cardiovascular Control in Humans

NCT03626363
View directory record Official record
Conditions
Elevated Blood Pressure
Interventions
Stress Management
Behavioral
Lead sponsor
Michigan Technological University
Other
Eligibility
18 Years to 45 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
Hammond, Indiana
Source: ClinicalTrials.gov public record
Updated Nov 8, 2024 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Phase 4 Interventional

Static Lung Hyperinflation and Sympathetic Nerve Activity-Associated Large Artery Stiffness in COPD Patients

NCT03611699
View directory record Official record
Conditions
COPD
Interventions
Umeclidinium / Vilanterol Dry Powder Inhaler, Placebo
Drug
Lead sponsor
Gary L. Pierce
Other
Eligibility
30 Years to 80 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 14, 2020 · Synced Oct 22, 2026, 10:59 PM EDT
Not yet recruiting Phase 4 Interventional Accepts healthy volunteers

SPARK Study - Sympathetic Periarterial Radial Block in Healthy Volunteers

NCT07429292
View directory record Official record
Conditions
Healthy Volunteers, Sympathetic Activity
Interventions
Lidocaine 2%
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 50 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 17, 2026 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

End Tidal CO2 and Masks: Is There a Correlation?

NCT06437301
View directory record Official record
Conditions
Hypercapnia
Interventions
Baseline measure of ETCO2 without mask, Baseline ETCO2 with mask, ETCO2 after 200 meter walk with mask, ETCO2 after 200 meter walk without mask
Other
Lead sponsor
CHRISTUS Health
Other
Eligibility
18 Years to 75 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Corpus Christi, Texas
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Oct 22, 2026, 10:59 PM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

Exploring Sympathetic Nervous System Function in Individuals With Down Syndrome

NCT07238465
View directory record Official record
Conditions
Down Syndrome, Autonomic Dysfunction
Interventions
Cold Stress, Maximal Dynamic Exercise, Isometric Handgrip Exercise with Post-Exercise Muscle Ischemia, Head-up Tilt Table Test
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 50 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Oct 13, 2026 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Not applicable Interventional

Heat Therapy and Cardiometabolic Health in Obese Women

NCT03644524
View directory record Official record
Conditions
Obesity, Polycystic Ovary Syndrome, Prehypertension, PreDiabetes, Cardiovascular Risk Factor, Metabolic Syndrome
Interventions
Heat therapy
Behavioral
Lead sponsor
University of Oregon
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 23, 2018 · Synced Oct 22, 2026, 10:59 PM EDT
Recruiting Phase 1 Interventional

Mitigating the Pro-inflammatory Phenotype of Obesity

NCT04934228
View directory record Official record
Conditions
Blood Pressure, Diabetes, Obesity, Insulin Resistance, Diuretics Drug Reactions, Sympathetic Nerve Activity
Interventions
Hydrochlorothiazide 12.5Mg Tab, Clonidine Pill, Placebo
Drug
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 79 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 5, 2025 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Alcohol and Neural Cardiovascular Control in Binge Drinkers

NCT03567434
View directory record Official record
Conditions
Binge Drinking
Interventions
Alcohol vs. Placebo
Other
Lead sponsor
Baylor University
Other
Eligibility
21 Years to 40 Years
Enrollment
69 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
Bozeman, Montana
Source: ClinicalTrials.gov public record
Updated Sep 24, 2024 · Synced Oct 22, 2026, 10:59 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Time-Efficient Inspiratory Muscle Strength Training for Reducing Sympathetic Activity and Improving Sleep in Midlife Women

NCT06743269
View directory record Official record
Conditions
Menopause, Hot Flashes, Blood Pressure Regulation
Interventions
High-Resistance Inspiratory Muscle Strength Training, Low-Resistance Inspiratory Muscle Strength Training, POWERbreathe K3 device
Behavioral · Device
Lead sponsor
Mayo Clinic
Other
Eligibility
45 Years to 60 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Oct 22, 2026, 10:59 PM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

Study to Improve Scientific Understanding of the Cardiovascular Actions of Cocaine

NCT00338546
View directory record Official record
Conditions
Cocaine Induced Sympathoexciation and Vasoconstriction
Interventions
Cocaine hydrochloride, Dexmedetomidine, Microneurography, Laser doppler velocimetry
Drug · Procedure
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jan 16, 2019 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Phase 4 Interventional Results available

Using Clonidine to Improve Leg Weakness in People With Heart Failure

NCT00858845
View directory record Official record
Conditions
Heart Failure
Interventions
Clonidine Patch, Matching Placebo Patch
Drug · Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 65 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 24, 2018 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

E-cigarettes, Nicotine Inhaler, and Blood Vessel Function

NCT03072628
View directory record Official record
Conditions
Nicotine Dependence
Interventions
e-cig with nicotine, e-cig without nicotine, nicotine inhaler, sham control
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 45 Years
Enrollment
148 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 4, 2023 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mechanisms and Management of Exercise Intolerance in Older Heart Failure Patients

NCT03111017
View directory record Official record
Conditions
Heart Failure, Diastolic
Interventions
Exercise Training
Other
Lead sponsor
The University of Texas at Arlington
Other
Eligibility
60 Years and older
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Arlington, Texas
Source: ClinicalTrials.gov public record
Updated Mar 3, 2020 · Synced Oct 22, 2026, 10:59 PM EDT
Withdrawn Phase 1Phase 2 Interventional

Controlling Hyperadrenergic Activity in Neurologic Injury

NCT01343329
View directory record Official record
Conditions
Traumatic Brain Injury, Dysautonomia
Interventions
Esmolol, Propranolol
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 100 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 20, 2017 · Synced Oct 22, 2026, 10:59 PM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Sympathetic Vascular Transduction Across the Menopause Transition: Contributing Mechanisms

NCT06787066
View directory record Official record
Conditions
Menopause
Interventions
Propranolol Hydrochloride, Phentolamine Injection
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 70 Years · Female only
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 15, 2025 · Synced Oct 22, 2026, 10:59 PM EDT
Active, not recruiting No phase listed Observational

Sympathetic Activity in Post-injury Outcomes: Impact on Sleep and caRdiovascular Health InvesTigation

NCT05971433
View directory record Official record
Conditions
Hypertension, Cardiovascular Diseases, Sleep Disorder, Arrythmia, Sympathetic Nervous System, Injury Traumatic
Interventions
Not listed
Lead sponsor
Uniformed Services University of the Health Sciences
Federal
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 13, 2026 · Synced Oct 22, 2026, 10:59 PM EDT
Completed No phase listed Observational

Assessment of Sympathetic Nervous System Activity by Microneurography Recording Technique

NCT00341770
View directory record Official record
Conditions
Nervous System
Interventions
Not listed
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
4 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1991 – 2010
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Noninvasive Measurement of Sympathetic Nerve Activity in Healthy Volunteers

NCT02264262
View directory record Official record
Conditions
Sympathetic Nerve Activity
Interventions
Physiologic maneuvers
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 45 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 14, 2020 · Synced Oct 22, 2026, 10:59 PM EDT
Withdrawn Phase 2 Interventional Accepts healthy volunteers

Skin Sympathetic Nerve Activity and Cardiac Arrhythmias

NCT02939469
View directory record Official record
Conditions
Sympathetic Nerve Activity
Interventions
Physiologic maneuvers
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 45 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 14, 2019 · Synced Oct 22, 2026, 10:59 PM EDT
Recruiting No phase listed Observational

Transduction of Sympathetic Neural Activity in Human Obesity Without Hypertension

NCT06626113
View directory record Official record
Conditions
Obesity
Interventions
ascorbic acid
Drug
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 79 Years
Enrollment
60 participants
Timeline
2022 – 2027
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Oct 3, 2024 · Synced Oct 22, 2026, 10:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Respiratory Muscle Contribution to Blood Pressure During Exercise

NCT03514823
View directory record Official record
Conditions
Respiratory Muscle, Blood Pressure, Exercise Capacity, Sympathetic Nerve Activity
Interventions
Inspiratory Muscle Training (IMT), No Inspiratory Muscle Training (IMT)
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 80 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 26, 2021 · Synced Oct 22, 2026, 10:59 PM EDT