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Showing 1–24 of 48 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Sympathetic Activity Clear all
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 14, 2025 · Synced Sep 4, 2026, 11:00 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 8, 2026 · Synced Sep 4, 2026, 11:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Hypoglycemia and Autonomic Nervous System Function

NCT01816893
View directory record Official record
Conditions
Hypoglycemia
Interventions
Hypoglycemic hyperinsulinemic clamp, Euglycemic hyperinsulinemic clamp
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 50 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 1, 2018 · Synced Sep 4, 2026, 11:00 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 16, 2026 · Synced Sep 4, 2026, 11:00 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
Fear Response, Cold Stress, Pain Response, Caffeine, 12-Hour Fast, Maximal Dynamic Exercise
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 50 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Sep 4, 2026, 11:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Exploration of Blood Flow Regulation to Bone in Humans

NCT04083794
View directory record Official record
Conditions
Bone Blood Flow Regulation
Interventions
Laboratory based assessments
Other
Lead sponsor
Spaulding Rehabilitation Hospital
Other
Eligibility
18 Years to 40 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 16, 2024 · Synced Sep 4, 2026, 11:00 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 23, 2024 · Synced Sep 4, 2026, 11:00 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Cardiovascular and Neurovascular Regulation in GWI

NCT04586049
View directory record Official record
Conditions
Brain Blood Flow, Neurovascular Control
Interventions
MRI, Transcranial Doppler Ultrasound, Sympathetic Nerve Activity
Device · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
45 Years to 68 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Sep 4, 2026, 11:00 PM EDT
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 17, 2026 · Synced Sep 4, 2026, 11:00 PM EDT
Terminated No phase listed Observational

Catheter Ablation of Ventricular Arrhythmia Reduces Skin Sympathetic Activity

NCT04837183
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 2, 2024 · Synced Sep 4, 2026, 11:00 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 2, 2020 · Synced Sep 4, 2026, 11:00 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 2, 2020 · Synced Sep 4, 2026, 11:00 PM EDT
Recruiting Not applicable Interventional

Mental Stress Reactivity in Women With CMD

NCT05401630
View directory record Official record
Conditions
Post-menopause
Interventions
Study Procedures
Other
Lead sponsor
Emory University
Other
Eligibility
45 Years and older · Female only
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
4
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 28, 2026 · Synced Sep 4, 2026, 11:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sympathetic-Somatomotor Coupling in Human Spinal Cord Injury

NCT02115685
View directory record Official record
Conditions
Spinal Cord Injury
Interventions
Treadmill Training
Other
Lead sponsor
Shirley Ryan AbilityLab
Other
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 5, 2021 · Synced Sep 4, 2026, 11:00 PM EDT
Enrolling by invitation 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 May 21, 2026 · Synced Sep 4, 2026, 11:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Meal Timing and Blood Pressure

NCT04133701
View directory record Official record
Conditions
Blood Pressure, Neurovascular Control
Interventions
Time-Restricted Feeding
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
50 Years to 65 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 21, 2023 · Synced Sep 4, 2026, 11:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

E-Cigarettes and SNA

NCT02724241
View directory record Official record
Conditions
Nicotine Dependence
Interventions
one time exposure to e-cig with nicotine, One time exposure to e-cigarette without nicotine, one time exposure to empty e-cigarette
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 45 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 19, 2021 · Synced Sep 4, 2026, 11:00 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 7, 2024 · Synced Sep 4, 2026, 11:00 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 15, 2019 · Synced Sep 4, 2026, 11:00 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vascular Function and Uterine Fibroids

NCT02123069
View directory record Official record
Conditions
Leiomyoma
Interventions
Brachial artery catheter, Acetylcholine, Nitroprusside, Norepinephrine, Nitroprusside and phenylephrine
Device · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
25 Years to 50 Years · Female only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 1, 2018 · Synced Sep 4, 2026, 11:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sympathetic Nervous System Mediation of Acute Exercise Effects on Childhood Brain and Cognition

NCT03592238
View directory record Official record
Conditions
Exercise, Cognition
Interventions
Aerobic Exercise Intervention, Trier Social Stress Test for Children, Seated Rest
Other
Lead sponsor
Northeastern University
Other
Eligibility
9 Years to 10 Years
Enrollment
297 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 21, 2025 · Synced Sep 4, 2026, 11:00 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study of Norepinephrine Levels and Sympathetic Nervous System Activity

NCT00001329
View directory record Official record
Conditions
Autonomic Nervous System Disease, Healthy, Hypertension
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1992 – 2002
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 4, 2026, 11:00 PM EDT
Completed Not applicable Interventional

Cardiac Sympathetic Activity in Patients With the Apical Ballooning Syndrome

NCT00586183
View directory record Official record
Conditions
Apical Ballooning Syndrome
Interventions
PET scan
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 3, 2008 · Synced Sep 4, 2026, 11:00 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 2, 2024 · Synced Sep 4, 2026, 11:00 PM EDT