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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Cardiac Physiology Clear all
Terminated Phase 1 Interventional

Sildenafil to Treat HIV-Associated Pulmonary Hypertension

NCT00327080
View directory record Official record
Conditions
HIV
Interventions
MRI, L-NMMA, Acetylcholine
Procedure · Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Not applicable Interventional

Acute Effects of Intradialytic Exercise on Cardiovascular Function in Hemodialysis Patients

NCT02753868
View directory record Official record
Conditions
Kidney Failure
Interventions
exercise, Hemodialysis treatment
Behavioral · Procedure
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
18 Years to 80 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 6, 2017 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Not applicable Interventional

Effect of Transcutaneous Vagal Stimulation (TVS) on Endothelial Function and Arterial Stiffness in HFrEF

NCT03380156
View directory record Official record
Conditions
Heart Failure With Reduced Ejection Fraction, Endothelial Dysfunction
Interventions
TVS, Sham TVS
Device
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jan 13, 2021 · Synced Jul 23, 2026, 9:30 AM EDT
Terminated Phase 2 Interventional

Concentrated Saline Infusions and Increased Dietary Sodium With Diuretics for Heart Failure With Kidney Dysfunction

NCT00575484
View directory record Official record
Conditions
Congestive Heart Failure, Renal Insufficiency
Interventions
Hypertonic saline, then oral sodium chloride, Normal saline, then oral placebo capsule
Drug
Lead sponsor
Barnes-Jewish Hospital
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 23, 2014 · Synced Jul 23, 2026, 9:30 AM EDT
Recruiting Phase 1 Interventional

Novel Approaches for Improving Vascular Function in Veterans With HFpEF

NCT06312748
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction, Inflammation
Interventions
L-Citrulline, Placebo for L-Citrulline, BH4, Placebo for BH4, Atorvastatin, Placebo for Atorvastatin
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2030
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Not applicable Interventional

Stress Management and Resiliency Training Following Acute Myocardial Infarction

NCT05415735
View directory record Official record
Conditions
Heart Attack, Cardiovascular Diseases
Interventions
Stress Management and Resiliency Training Program
Behavioral
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 20, 2024 · Synced Jul 23, 2026, 9:30 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Fetal Cardiac Function Parameters and HbA1c As Screening for Gestational Diabetes Mellitus

NCT05019508
View directory record Official record
Conditions
Gestational Diabetes
Interventions
Not listed
Lead sponsor
University of Virginia
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
114 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Jan 15, 2025 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Phase 2 Interventional

Pirfenidone to Treat Hypertrophic Cardiomyopathy

NCT00011076
View directory record Official record
Conditions
Hypertrophic Cardiomyopathy
Interventions
Pirfenidone
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Not applicable Interventional

GRAVITAS: Gauging Responsiveness With A VerifyNow Assay-Impact On Thrombosis And Safety

NCT00645918
View directory record Official record
Conditions
Coronary Arteriosclerosis, Acute Coronary Syndrome
Interventions
clopidogrel, placebo
Drug
Lead sponsor
Accumetrics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
2,800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
72
States / cities
Birmingham, Alabama • Scottsdale, Arizona • La Jolla, California + 59 more
Source: ClinicalTrials.gov public record
Updated Jun 15, 2011 · Synced Jul 23, 2026, 9:30 AM EDT
Suspended Not applicable Interventional

Exercise Training to Improve Cardiopulmonary Hemodynamics in Heart Failure Patients

NCT04909008
View directory record Official record
Conditions
Heart Failure, Pulmonary Hypertension
Interventions
Exercise Training
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Not applicable Interventional Results available

Evaluation of Atorvastatin on Atherosclerosis Composition

NCT00576576
View directory record Official record
Conditions
Atherosclerosis
Interventions
Atorvastatin
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 23, 2013 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Phase 2Phase 3 Interventional

Sildenafil Exercise: Role of PDE5 Inhibition

NCT04039087
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Sildenafil 40mg oral capsule, Placebo Oral capsule
Drug
Lead sponsor
National Jewish Health
Other
Eligibility
9 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
2
States / cities
Denver, Colorado • Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jul 23, 2026, 9:30 AM EDT
Not yet recruiting No phase listed Observational

An International Multicenter, Multivendor Evaluation of the Free-Running Framework for Cardiac Function

NCT07613398
View directory record Official record
Conditions
Congenital Heart Diseases, Cardiac Diseases
Interventions
Not listed
Lead sponsor
Matthias Stuber
Other
Eligibility
Not listed
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
9
States / cities
Los Angeles, California • Atlanta, Georgia • Chicago, Illinois + 6 more
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Jul 23, 2026, 9:30 AM EDT
Completed No phase listed Observational

Impact of Allo- and Autoantibodies on Chronic Cardiac Allograft Function

NCT02752789
View directory record Official record
Conditions
Pediatric Heart Transplantation, Pediatric Heart Transplant Recipients
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Up to 20 Years
Enrollment
407 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
8
States / cities
Atlanta, Georgia • Boston, Massachusetts • St Louis, Missouri + 4 more
Source: ClinicalTrials.gov public record
Updated Nov 28, 2019 · Synced Jul 23, 2026, 9:30 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Pediatric Hypertension and the Renin-Angiotensin SystEm (PHRASE)

NCT04752293
View directory record Official record
Conditions
Hypertension, Left Ventricular Hypertrophy, Left Ventricular Dysfunction, Left Atrial Dilatation, Left Ventricular Diastolic Dysfunction, Kidney Diseases, Kidney Injury, Kidney Dysfunction, Sodium Urine High, Blood Pressure Disorders, Uric Acid Retention, Angiotensin Hypertension, Autonomic Dysfunction, Autonomic Imbalance, Pediatric Kidney Disease, Pediatric Obesity, Proteinuria, Albuminuria
Interventions
Not listed
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
7 Years to 18 Years
Enrollment
125 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 10, 2025 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Worksite Wellness Within Long-term Care Facilities

NCT04166643
View directory record Official record
Conditions
Worksite Health Promotion, Lifestyle Risk Reduction, Cardiovascular Diseases, Occupational Stress, Healthcare Workers
Interventions
WHHIP PLUS, Education only control
Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
159 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Jul 23, 2026, 9:30 AM EDT
Recruiting Not applicable Interventional

Heart Disease of the Small Arteries in Women and Men

NCT00573027
View directory record Official record
Conditions
Heart Disease
Interventions
noninvasive tests
Procedure
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
634 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2040
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 31, 2023 · Synced Jul 23, 2026, 9:30 AM EDT
Completed No phase listed Observational

Longitudinal Energy Expenditure and Metabolic Effects in Patients With COVID-19 (LEEP-COVID)

NCT04350073
View directory record Official record
Conditions
COVID-19
Interventions
Q-NRG Metobolic Cart Device, MuscleSound Ultrasound, Multifrequency Bioimpedance Spectroscopy
Device
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 15, 2023 · Synced Jul 23, 2026, 9:30 AM EDT
Terminated Phase 4 Interventional

Reversing Endothelial and Diastolic Dysfunction and Improving Collagen Turnover in Diastolic Heart Failure

NCT00293150
View directory record Official record
Conditions
Diastolic Heart Failure
Interventions
Eplerenone
Drug
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 26, 2017 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Not applicable Interventional

Effects of Curcumin Supplementation on Gut Barrier Function in Patients With Metabolic Syndrome

NCT03542240
View directory record Official record
Conditions
Obesity, High Blood Pressure, High Cholesterol, Type2 Diabetes, Heart Diseases
Interventions
Curcumin
Dietary Supplement
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jan 25, 2021 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Dark Chocolate on Exercise Capacity, and Mitochondrial Structure and Function

NCT01671514
View directory record Official record
Conditions
Heart Failure, Type 2 Diabetes
Interventions
Epicatechin-enriched dark chocolate, Low-epicatechin dark chocolate
Dietary Supplement · Other
Lead sponsor
University of California, San Diego
Other
Eligibility
40 Years to 70 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jun 2, 2015 · Synced Jul 23, 2026, 9:30 AM EDT
Completed No phase listed Observational

Using Magnetic Resonance Imaging to Evaluate Heart Vessel Function After Angioplasty or Stent Placement Procedures

NCT00692991
View directory record Official record
Conditions
Myocardial Infarction, Angina, Unstable, Cardiomyopathy, Hypertrophic
Interventions
Not listed
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years and older
Enrollment
144 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2016
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 22, 2016 · Synced Jul 23, 2026, 9:30 AM EDT
Completed Phase 2 Interventional

The Effects of Hormones in Growth Hormone-Treated Girls With Turner Syndrome

NCT00001343
View directory record Official record
Conditions
Dwarfism, Turner's Syndrome
Interventions
Humatrope, Oxandrolone
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
10 Years to 14 Years · Female only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1992 – 2007
U.S. locations
2
States / cities
Bethesda, Maryland • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jul 23, 2026, 9:30 AM EDT
Recruiting No phase listed Observational

Gonadal Tissue Freezing for Fertility Preservation in Individuals at Risk for Ovarian Dysfunction, Premature Ovarian Insufficiency and Clinically Indicated Gonadectomy

NCT04948658
View directory record Official record
Conditions
Turner Syndrome, Post-menarcheal Adolescents, Ovarian Disfunction, Galactosemia, Variations in Sex Characteristics, Differences in Sex Development
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
2 Years to 35 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2030
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 24, 2026 · Synced Jul 23, 2026, 9:30 AM EDT