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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Sympathetic Activity Clear all
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 1, 2017 · Synced Sep 5, 2026, 1:26 PM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Type 1 Diabetes Autonomic and Vascular Function

NCT06786546
View directory record Official record
Conditions
Type 1 Diabetes (Juvenile Onset), Type 1 Diabetes, Diabetes, Autoimmune
Interventions
Not listed
Lead sponsor
University of Texas at Austin
Other
Eligibility
18 Years to 70 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2029
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Sep 5, 2026, 1:26 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Withdrawn Phase 1Phase 2 Interventional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 19, 2017 · Synced Sep 5, 2026, 1:26 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 18, 2024 · Synced Sep 5, 2026, 1:26 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 22, 2018 · Synced Sep 5, 2026, 1:26 PM EDT
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Neural Mechanism of Aldosterone-induced Insulin Resistance

NCT02102243
View directory record Official record
Conditions
Hypertension
Interventions
DEFINITY® infusion, Human Recombinant Regular Insulin infusion, Dextrose infusion, Flow mediated vasodilation, Endothelial cell collection, Microvascular perfusion assessment using Definity, Microneurography
Drug · Procedure
Lead sponsor
Wanpen Vongpatanasin
Other
Eligibility
18 Years to 75 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2025
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 14, 2023 · Synced Sep 5, 2026, 1:26 PM EDT
Withdrawn Phase 3 Interventional

Mechanism of Masked Hypertension - Intervention

NCT04121299
View directory record Official record
Conditions
Masked Hypertension
Interventions
Carvedilol, Amlodipine
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Nov 4, 2021 · Synced Sep 5, 2026, 1:26 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 25, 2021 · Synced Sep 5, 2026, 1:26 PM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

Role of Sympathetic Activity and Splanchnic Capacitance in Hypertension

NCT02425566
View directory record Official record
Conditions
Hypertension
Interventions
Trimethaphan, Nitroglycerin
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2028
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Sep 5, 2026, 1:26 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 20, 2023 · Synced Sep 5, 2026, 1:26 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 13, 2020 · Synced Sep 5, 2026, 1:26 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 23, 2018 · Synced Sep 5, 2026, 1:26 PM EDT
Suspended Early Phase 1 Interventional Accepts healthy volunteers

Impact of Intranasal Insulin on Sympathetic Activity and Cerebral Vasodilation

NCT05153395
View directory record Official record
Conditions
Healthy, Vasodilation, Insulin Resistance, Autonomic Dysfunction, Obesity
Interventions
Carbon dioxide breathing, Neurovascular Coupling, Human insulin
Other · Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 45 Years
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Sep 5, 2026, 1:26 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Reducing Blood Pressure in Mid-life Adult Binge Drinkers

NCT05522075
View directory record Official record
Conditions
Alcohol Drinking, Binge Drinking, Blood Pressure, Alcohol Abstinence, Aging, Lifestyle Factors, Vasodilation, Behavioral Problem
Interventions
Exercise Training, Alcohol Abstinence Intervention
Behavioral
Lead sponsor
The University of Texas at Arlington
Other
Eligibility
50 Years to 64 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Arlington, Texas
Source: ClinicalTrials.gov public record
Updated May 31, 2026 · Synced Sep 5, 2026, 1:26 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 4, 2025 · Synced Sep 5, 2026, 1:26 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 13, 2019 · Synced Sep 5, 2026, 1:26 PM EDT
Completed Phase 4 Interventional Results available

Comparison of Nebivolol and Metoprolol With Exercise and Angiotensin II in Hypertensive Patients

NCT01502787
View directory record Official record
Conditions
Hypertension
Interventions
Metoprolol succinate, Nebivolol, Forearm blood flow, Microneurography, Rhythmic handgrip exercise, Lower body negative pressure, Angiotensin II
Drug · Procedure
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jul 6, 2020 · Synced Sep 5, 2026, 1:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Role of the Sympathetic Nervous System in Rosacea

NCT03989492
View directory record Official record
Conditions
Rosacea
Interventions
systemic and local stressors
Other
Lead sponsor
Kristen Metzler-Wilson
Other
Eligibility
18 Years to 45 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
2
States / cities
Indianapolis, Indiana • Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Sep 22, 2025 · Synced Sep 5, 2026, 1:26 PM EDT
Not listed Phase 4 Interventional

Impact of Suvorexant on Sympathetic Nerve Activity and Baroreflex Function in Chronic Insomnia

NCT03768713
View directory record Official record
Conditions
Chronic Insomnia
Interventions
Suvorexant, Placebo
Drug
Lead sponsor
Montana State University
Other
Eligibility
18 Years to 65 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Bozeman, Montana
Source: ClinicalTrials.gov public record
Updated Oct 6, 2021 · Synced Sep 5, 2026, 1:26 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 13, 2020 · Synced Sep 5, 2026, 1:26 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 3, 2023 · Synced Sep 5, 2026, 1:26 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Characterization of Sympathetic Nerve Activity in Stress Cardiomyopathy

NCT01048125
View directory record Official record
Conditions
Cardiomyopathy
Interventions
Sympathetic Nerve Activity, Mental Stress Test (Color Word Test), The Modified Oxford Technique for Baroreflex Sensitivity, Cold Pressor Test, Echocardiographic evaluation
Device · Behavioral · Drug + 1 more
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 90 Years
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 22, 2016 · Synced Sep 5, 2026, 1:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sympathetic Nerve Activity During Hypoglycemia and Exercise

NCT00608348
View directory record Official record
Conditions
Diabetes Mellitus
Interventions
Hyperinsulinemic glucose clamp procedures, moderate exercise
Procedure
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 40 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2008
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 9, 2015 · Synced Sep 5, 2026, 1:26 PM EDT
Completed Phase 2 Interventional Results available

DASH After TBI Study: Decreasing Adrenergic or Sympathetic Hyperactivity After Traumatic Brain Injury

NCT01322048
View directory record Official record
Conditions
Brain Injuries, Craniocerebral Trauma, Trauma, Nervous System, Traumatic Brain Injury
Interventions
IV Propranolol and Per Tube Clonidine, Placebo
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
16 Years to 64 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 16, 2017 · Synced Sep 5, 2026, 1:26 PM EDT