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Showing 1–24 of 134 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Stiffness, Vascular Clear all
Completed Not applicable Interventional

Galectin-3 Blockade in Patients With High Blood Pressure

NCT01960946
View directory record Official record
Conditions
Hypertension
Interventions
Modified Citrus Pectin (MCP) vs placebo
Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
21 Years to 70 Years
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 20, 2021 · Synced Jul 22, 2026, 3:01 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Impact of Elastin Mediated Vascular Stiffness on End Organs

NCT02840448
View directory record Official record
Conditions
Williams Syndrome, Supravalvular Aortic Stenosis, Cardiovascular Disease
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
3 Years to 85 Years
Enrollment
159 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2024
U.S. locations
2
States / cities
Bethesda, Maryland • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Jul 22, 2026, 3:01 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Sex in the Effect of Dietary Capsaicin on Cardiovascular Health

NCT06363305
View directory record Official record
Conditions
Pre Hypertension, Hypertension
Interventions
Dietary capsules
Dietary Supplement
Lead sponsor
Skidmore College
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Saratoga Springs, New York
Source: ClinicalTrials.gov public record
Updated Jul 9, 2024 · Synced Jul 22, 2026, 3:01 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

L-citrulline Supplementation & Cold Exposure

NCT01462591
View directory record Official record
Conditions
Hypertension
Interventions
L-citrulline
Dietary Supplement
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Aug 4, 2014 · Synced Jul 22, 2026, 3:01 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Blood Flow and Vascular Function in Cystic Fibrosis

NCT02057458
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Sildenafil (Acute-1 hour), Sildenafil (Subchronic-4 weeks), Placebo
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 23, 2020 · Synced Jul 22, 2026, 3:01 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Ventricular-Vascular Coupling in Heart Failure

NCT00207220
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction
Interventions
arterial tonometry, echocardiography
Procedure
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 80 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 8, 2007 · Synced Jul 22, 2026, 3:01 PM EDT
Recruiting No phase listed Observational

Puberty Suppression and Cardiometabolic Health

NCT04482374
View directory record Official record
Conditions
Transgenderism, Insulin Sensitivity/Resistance, Endothelial Dysfunction, Vascular Stiffness
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
9 Years to 14 Years · Male only
Enrollment
30 participants
Timeline
2020 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 9, 2025 · Synced Jul 22, 2026, 3:01 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Prevention of Cardiovascular Stiffening With Aging and Hypertensive Heart Disease

NCT03476785
View directory record Official record
Conditions
Lv Hypertrophy, Heart Failure, Diastolic, Stiffness, Vascular
Interventions
High intensity exercise, Yoga
Behavioral
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
40 Years to 64 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 13, 2019 · Synced Jul 22, 2026, 3:01 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Influence of Beetroot Juice on Racial Disparities in Vascular Health

NCT05132556
View directory record Official record
Conditions
Blood Pressure, Racial Disparities, Cardiovascular Risk Factor
Interventions
Acute Beetroot Juice
Other
Lead sponsor
Georgia Southern University
Other
Eligibility
18 Years to 39 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Savannah, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 4, 2023 · Synced Jul 22, 2026, 3:01 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Endothelin Receptor Function and Acute Stress

NCT02116335
View directory record Official record
Conditions
Hypertension
Interventions
Bosentan, Placebo
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 50 Years
Enrollment
320 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2026
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 27, 2025 · Synced Jul 22, 2026, 3:01 PM EDT
Active, not recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Fisetin to Improve Vascular Function in Older Adults

NCT06133634
View directory record Official record
Conditions
Aging, Endothelial Dysfunction, Arterial Stiffness
Interventions
Fisetin, Placebo
Dietary Supplement · Other
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
65 Years and older
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 11, 2025 · Synced Jul 22, 2026, 3:01 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vitamin D, Insulin Sensitivity, and Vascular Associations in Adolescents

NCT01041365
View directory record Official record
Conditions
Insulin Sensitivity, Flow-mediated Dilation, Arterial Stiffness
Interventions
Not listed
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
14 Years to 18 Years · Female only
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jan 13, 2014 · Synced Jul 22, 2026, 3:01 PM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Acetate and Age-associated Arterial Dysfunction

NCT05424263
View directory record Official record
Conditions
Aging, Vascular Stiffness, Vascular Dilation
Interventions
Calcium Acetate Oral Solution, Calcium Carbonate Oral Suspension
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
50 Years and older
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 14, 2024 · Synced Jul 22, 2026, 3:01 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Vascular Function in Adults With Down Syndrome

NCT07630207
View directory record Official record
Conditions
Down Syndrome (Trisomy 21)
Interventions
Not listed
Lead sponsor
University of Nevada, Las Vegas
Other
Eligibility
18 Years to 35 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Jul 22, 2026, 3:01 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Study of Febuxostat Effect on Blood Pressure in Patients With High Normal Blood Pressure

NCT01472692
View directory record Official record
Conditions
Prehypertension, Gout, Pulse Wave Velocity, Hypertension, 24 Hour Blood Pressure
Interventions
Febuxostat
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 50 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Dec 15, 2019 · Synced Jul 22, 2026, 3:01 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Magnetic Resonance Elastography as a Method to Estimate Stiffness of Soft Tissues

NCT01757730
View directory record Official record
Conditions
Heart Failure, Liver Fibrosis, Cardiac Transplant Rejection, Aortic Aneurysms
Interventions
Not listed
Lead sponsor
Arunark Kolipaka
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2028
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 5, 2025 · Synced Jul 22, 2026, 3:01 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Secondhand Effects of Hookah (i.e., Waterpipe) Smoke and Aerosol

NCT04661683
View directory record Official record
Conditions
Hookah Smoking, Secondhand Aerosol, Vascular Stiffness, Vaping
Interventions
Combustible Hookah Smoke, Electronic Hookah Aerosol, Clean Room Air
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 49 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Jul 22, 2026, 3:01 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Longitudinal Assessment of Exercise Capacity and Vascular Function in Patients With CF

NCT03338595
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Not listed
Lead sponsor
Augusta University
Other
Eligibility
7 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 18, 2021 · Synced Jul 22, 2026, 3:01 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Targeting Inflammation to Treat Cardiovascular Aging

NCT01775865
View directory record Official record
Conditions
Vascular Stiffness, Endothelial Dysfunction, Diastolic Dysfunction
Interventions
Salsalate, Placebo (for salsalate)
Drug
Lead sponsor
Gary L. Pierce
Other
Eligibility
18 Years to 79 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated May 30, 2018 · Synced Jul 22, 2026, 3:01 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Determinants of Changes in Arterial Load Following Exercise

NCT05820243
View directory record Official record
Conditions
Post-Exercise Hypotension
Interventions
Moderate Intensity Aerobic Exercise
Other
Lead sponsor
University of Delaware
Other
Eligibility
18 Years to 45 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Nov 27, 2023 · Synced Jul 22, 2026, 3:01 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Low Energy Availability and Hypertension in Division I HBCU Athletes

NCT07583940
View directory record Official record
Conditions
Vascular Stiffness, Hypertension (HTN), Nutritional Deficiency Related Cardiovascular Risk in Athletes
Interventions
Not listed
Lead sponsor
North Carolina Agriculture & Technical State University
Other
Eligibility
18 Years to 26 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Greensboro, North Carolina
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Jul 22, 2026, 3:01 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Safety Study to Lower the Risk of Heart Failure is Also Effective in Reducing Stiffness of the Arteries

NCT00829296
View directory record Official record
Conditions
Hypertension, Diabetes
Interventions
nebivolol, Metoprolol
Drug
Lead sponsor
University of Chicago
Other
Eligibility
50 Years to 85 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 4, 2016 · Synced Jul 22, 2026, 3:01 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of Inorganic Nitrate and Intensity of Exercise on Cardiovascular Health in Post-Menopausal Females

NCT05221905
View directory record Official record
Conditions
Vascular Dilation, Arterial Stiffness
Interventions
BEET IT - Concentrate Beet root juice, BEET IT - Concentrate Beet root juice (nitrate depleted)
Drug
Lead sponsor
University of Virginia
Other
Eligibility
45 Years to 75 Years · Female only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Nov 29, 2023 · Synced Jul 22, 2026, 3:01 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

8 Weeks of L-CIT Supplementation and LIRET on Vascular Function in Hypertensive Postmenopausal Women

NCT05227781
View directory record Official record
Conditions
Hypertension, Menopause
Interventions
L-Citrulline, Placebo
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
50 Years to 75 Years · Female only
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Feb 6, 2022 · Synced Jul 22, 2026, 3:01 PM EDT