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ClinicalTrials.gov public records Last synced Oct 20, 2026, 5:34 AM EDT

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Showing 49–72 of 85 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Syncope Clear all
Terminated Phase 2 Interventional Results available

Long-term Extension Study of the Safety and Pharmacokinetics of QCC374 in PAH Patients

NCT02939599
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
QCC374
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 5, 2021 · Synced Oct 20, 2026, 5:34 AM EDT
Completed No phase listed Observational

Autonomic Monitoring in Neurocardiogenic Syncope

NCT05907018
View directory record Official record
Conditions
Syncope, Chest Pain, Dyspnea
Interventions
Not listed
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
7 Years to 24 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 29, 2025 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Not applicable Interventional

Qualitative Sweat Distribution During Tilt Table Procedure

NCT02329548
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Syncope, Anxiety
Interventions
Alizarin Red
Other
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
12 Years to 25 Years
Enrollment
95 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 31, 2017 · Synced Oct 20, 2026, 5:34 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

LUX-Dx Insertable Cardiac Monitor Remote Programming and Performance Study

NCT04732728
View directory record Official record
Conditions
Atrial Fibrillation, Syncope, Cryptogenic Stroke
Interventions
Not listed
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
727 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
24
States / cities
Huntsville, Alabama • Flagstaff, Arizona • Jonesboro, Arkansas + 21 more
Source: ClinicalTrials.gov public record
Updated Nov 25, 2024 · Synced Oct 20, 2026, 5:34 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of Chronic Orthostatic Intolerance

NCT00069693
View directory record Official record
Conditions
Syncope
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
10 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 20, 2026, 5:34 AM EDT
Completed No phase listed Observational

Improving Syncope Risk Stratification in Older Adults

NCT01802398
View directory record Official record
Conditions
Syncope
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
60 Years and older
Enrollment
3,707 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
10
States / cities
Sacramento, California • Boston, Massachusetts • Royal Oak, Michigan + 7 more
Source: ClinicalTrials.gov public record
Updated Jan 24, 2019 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Not applicable Interventional Results available

Study of New Implantable Loop Recorder

NCT00746564
View directory record Official record
Conditions
Tachyarrhythmias, Syncope
Interventions
SJM Confirm
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
9
States / cities
Anchorage, Alaska • Scottsdale, Arizona • Little Rock, Arkansas + 6 more
Source: ClinicalTrials.gov public record
Updated Jan 30, 2019 · Synced Oct 20, 2026, 5:34 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

AI-Enabled Direct-from-ECG Ejection Fraction (EF) Severity Assessment Using COR ECG Wearable Monitor

NCT06699056
View directory record Official record
Conditions
Ventricular Ejection Fraction, LVF, LV Dysfunction, Atrial Enlargement, Conduction Defect, Heart Failure, Valvular Heart Disease, Ischemic Heart Disease, Cardiotoxicity, Myocardial Infarction, Dilated Cardiomyopathy, HFrEF - Heart Failure With Reduced Ejection Fraction, HFpEF - Heart Failure With Preserved Ejection Fraction, Syncope, Remodeling, Cardiac
Interventions
15-minutes of sitting during COR ECG Acquistion
Device
Lead sponsor
Peerbridge Health, Inc
Industry
Eligibility
18 Years and older
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
8
States / cities
Orange, California • Pasadena, California • Detroit, Michigan + 5 more
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Oct 20, 2026, 5:34 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Reducing Orthostatic Intolerance With Oral Rehydration in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Patients

NCT02854683
View directory record Official record
Conditions
Chronic Fatigue Syndrome, Myalgic Encephalomyelitis, Systemic Exertion Intolerance Disease (SEID), Postural Tachycardia Syndrome (POTS), Neurally Mediated Syncope (NMS)
Interventions
Normal Saline, Oral Rehydration Solution
Drug · Dietary Supplement
Lead sponsor
New York Medical College
Other
Eligibility
15 Years to 29 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated Jun 10, 2021 · Synced Oct 20, 2026, 5:34 AM EDT
Terminated Phase 3 Interventional Results available

Phase 3 Clinical Effect Durability of TD-9855 for Treating Symptomatic nOH in Subjects With Primary Autonomic Failure

NCT03829657
View directory record Official record
Conditions
Symptomatic Neurogenic Orthostatic Hypotension, MSA, Parkinson's Disease (PD), Pure Autonomic Failure (PAF)
Interventions
ampreloxetine, Placebo
Drug
Lead sponsor
Theravance Biopharma
Industry
Eligibility
30 Years and older
Enrollment
203 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
20
States / cities
Sun City, Arizona • La Jolla, California • Palo Alto, California + 16 more
Source: ClinicalTrials.gov public record
Updated Jan 20, 2023 · Synced Oct 20, 2026, 5:34 AM EDT
Terminated Not applicable Interventional

Point-of-Care Ultrasound in the Emergency Department Evaluation of Syncope

NCT01671371
View directory record Official record
Conditions
Syncope
Interventions
Point-of-Care Ultrasound
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 30, 2016 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Early Phase 1 Interventional

Influence of Yoga in Patients With Neurocardiogenic Syncope

NCT01695525
View directory record Official record
Conditions
Syncope, Vasovagal
Interventions
Yoga
Other
Lead sponsor
Dhanunjaya Lakkireddy, MD, FACC
Other
Eligibility
18 Years to 60 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 30, 2015 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Novel Helmet Design in Patients With Seizures

NCT03443388
View directory record Official record
Conditions
Drug Resistant Epilepsy, Drop Seizures, Generalized Tonic Clonic Seizure, Complex Partial Seizure, Fall Due to Seizure
Interventions
Hövding inflatable helmet
Device
Lead sponsor
Michael A. Gelfand, MD, PhD
Other
Eligibility
18 Years to 60 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 9, 2025 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Drinking Dashboard Study

NCT05630625
View directory record Official record
Conditions
Alcohol Drinking
Interventions
Drinking Dashboard
Behavioral
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 30 Years
Enrollment
169 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 20, 2026, 5:34 AM EDT
Completed No phase listed Observational

Practical Approaches to Care in Emergency Syncope

NCT04533425
View directory record Official record
Conditions
Syncope, Presyncope
Interventions
Not listed
Lead sponsor
Columbia University
Other
Eligibility
40 Years and older
Enrollment
1,297 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
5
States / cities
Sacramento, California • New York, New York • Rochester, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 20, 2026, 5:34 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Multi-Site Near Infrared Spectroscopy (NIRS) Monitoring of Children During Tilt Table Testing

NCT00659464
View directory record Official record
Conditions
Syncope
Interventions
Not listed
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
7 Years to 21 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 13, 2012 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Phase 4 Interventional Results available

Clinical Trial for the Prevention of Vasovagal Syncope

NCT00118482
View directory record Official record
Conditions
Syncope, Vasovagal, Neurally-Mediated
Interventions
fludrocortisone acetate
Drug
Lead sponsor
University of Calgary
Other
Eligibility
14 Years and older
Enrollment
213 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
3
States / cities
Boston, Massachusetts • Nashville, Tennessee • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Oct 15, 2019 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Not applicable Interventional

Randomized Study of Midodrine, an Alpha Adrenergic Agonist, in Patients With Neurally Mediated Syncope

NCT00004479
View directory record Official record
Conditions
Syncope
Interventions
midodrine
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
16 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1999
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 24, 2005 · Synced Oct 20, 2026, 5:34 AM EDT
Terminated Phase 3 Interventional Results available

Phase 3 Open-Label Extension Study of TD-9855 for Treating Symptomatic nOH in Subjects With Primary Autonomic Failure

NCT04095793
View directory record Official record
Conditions
Symptomatic Neurogenic Orthostatic Hypotension
Interventions
ampreloxetine
Drug
Lead sponsor
Theravance Biopharma
Industry
Eligibility
30 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
13
States / cities
Colorado Springs, Colorado • Boca Raton, Florida • Port Charlotte, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Nov 30, 2022 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Phase 3 Interventional Results available

Clinical Effect of Ampreloxetine (TD-9855) for Treating Symptomatic nOH in Subjects With Primary Autonomic Failure

NCT03750552
View directory record Official record
Conditions
Symptomatic Neurogenic Orthostatic Hypotension
Interventions
ampreloxetine, Placebo
Drug
Lead sponsor
Theravance Biopharma
Industry
Eligibility
30 Years and older
Enrollment
195 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
23
States / cities
Sun City, Arizona • Long Beach, California • Palo Alto, California + 19 more
Source: ClinicalTrials.gov public record
Updated Sep 14, 2022 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Not applicable Interventional Results available

Preventing Post-Vaccination Presyncope and Syncope in Adolescents Using Simple, Clinic-based Interventions: A Pilot Study

NCT03533829
View directory record Official record
Conditions
Syncope, Vasovagal
Interventions
Buzzy®, Music
Device · Behavioral
Lead sponsor
Duke University
Other
Eligibility
10 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
2
States / cities
Atlanta, Georgia • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 16, 2019 · Synced Oct 20, 2026, 5:34 AM EDT
Completed No phase listed Observational

The U.S. Embryologist Fatigue Study

NCT05326802
View directory record Official record
Conditions
Fatigue, Stress, Burnout, Professional, Musculoskeletal Pain, Back Pain, Neck Pain, Headache, Dizziness, Sleep Disturbance, Chest Pain, Syncope, Cardiovascular Diseases, Shortness of Breath, Gastrointestinal Diseases
Interventions
Not listed
Lead sponsor
TMRW Life Sciences
Industry
Eligibility
22 Years to 65 Years
Enrollment
246 participants
Timeline
2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 25, 2023 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Not applicable Interventional

Abdominal and Lower Extremity Compression During Tilt Table Testing in Adolescent POTS Patients

NCT01795469
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome (POTS), Syncope
Interventions
Zoex compression garment
Device
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
12 Years to 19 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 31, 2017 · Synced Oct 20, 2026, 5:34 AM EDT
Completed Phase 3 Interventional Results available

Perioperative Antibiotic Therapy to Prevent Cardiac Implantable Electronic Device Infections.

NCT02809131
View directory record Official record
Conditions
Sick Sinus Syndrome, Complete Heart Block, Syncope, Chronic Systolic Heart Failure
Interventions
polymixin/bacitracin, cephalexin, or levofloxacin, or clindamycin, Saline
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
1,010 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 9, 2022 · Synced Oct 20, 2026, 5:34 AM EDT