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ClinicalTrials.gov public records Last synced Jul 22, 2026, 12:54 AM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Conditions
Syncope, Presyncope, Palpitations, Atrial Fibrillation, Supraventricular Tachycardia
Interventions
Not listed
Lead sponsor
Bardy Diagnostics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
4
States / cities
Chicago, Illinois • Iowa City, Iowa • Charlotte, North Carolina + 1 more
Conditions
Delirium, Confusion, Mental Status Change, Back Pain, Hip Pain Chronic, Chest Pain, Asthma, COPD, Cellulitis, Soft Tissue Infections, Cough, Deep Vein Thrombosis, Pulmonary Embolism, Venous Thromboembolism, Dyspnea, Electrolyte Metabolism Abnormal, Fever, Failure to Thrive, Weakness, Protein-Calorie Malnutrition, Headache, Neck Pain, Hypoxia, Pneumonia, Sepsis, Syncope, Vomiting, Diarrhea, Leg Pain, Abdominal Pain
Interventions
Diagnostic Uncertainty Educational Curriculum, Diagnostic Timeout, Patient Diagnostic (Dx) Questionnaire, Enhancements to Epic-integrated Quality & Safety Dashboard
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
700 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
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
Conditions
Syncope, Presyncope, Fainting, Cardiac Arrhythmia
Interventions
Not listed
Lead sponsor
Transoma Medical
Industry
Eligibility
Not listed
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2008
U.S. locations
8
States / cities
Atlanta, Georgia • Cumberland, Maryland • Lapeer, Michigan + 5 more
Conditions
Tachycardia, Ventricular, Implantable Cardioverter Defibrillator (ICD), Fibrillation, Ventricular, Syncope
Interventions
Implanted Device
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
700 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
31
States / cities
Birmingham, Alabama • Mesa, Arizona • Phoenix, Arizona + 28 more
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of Chronic Orthostatic Intolerance

NCT00069693
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
Completed No phase listed Observational Accepts healthy volunteers

PET Scan in Patients With Neurocardiologic Disorders

NCT00001418
Conditions
Autonomic Nervous System Diseases
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
335 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1994 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Completed Phase 4 Interventional Results available

Clinical Trial for the Prevention of Vasovagal Syncope

NCT00118482
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
Conditions
Syncope, Presyncope, Atrial Fibrillation, Supraventricular Tachycardia
Interventions
EKG Patch monitors (Zio and Carnation)
Device
Lead sponsor
EvergreenHealth
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Kirkland, Washington
Conditions
Vasovagal Syncope, AV Block-2Nd Degree-Type 1, Sinus Pause
Interventions
Ablation procedure
Procedure
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
300 participants
Timeline
2024 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
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
Conditions
Vasovagal Syncope
Interventions
midodrine hydrochloride, matching placebo
Drug
Lead sponsor
Dr. Bob Sheldon
Other
Eligibility
18 Years and older
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2024
U.S. locations
2
States / cities
Minneapolis, Minnesota • Nashville, Tennessee
Conditions
Atrial Fibrillation Paroxysmal, Atrial Fibrillation, Persistent, Cardiac Arrhythmia, Ablation
Interventions
Holter monitoring in patients who have been successfully implanted with an Abbott Assert-IQ ICM device
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years to 100 Years
Enrollment
151 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
11
States / cities
San Diego, California • Orlando, Florida • Overland Park, Kansas + 8 more
Conditions
Neurogenic Orthostatic Hypotension
Interventions
Sinosuidal Galvanic Vestibular Stimulation, Placebo
Device
Lead sponsor
Hackensack Meridian Health
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Hackensack, New Jersey
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
Conditions
Syncope, Pre-syncope, Atrial Fibrillation, Supraventricular Tachycardia
Interventions
Standard Holter/Investigational patch
Device
Lead sponsor
Seattle Institute for Cardiac Research
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011
U.S. locations
2
States / cities
Chicago, Illinois • Enumclaw, Washington
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
Conditions
Dysautonomia
Interventions
Not listed
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
9 Years to 18 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Conditions
Cardiopulmonary Failure, Myocardial Infarction (MI), Heart Decompensation, Heart Failure, HFrEF - Heart Failure with Reduced Ejection Fraction, HFpEF - Heart Failure with Preserved Ejection Fraction, Syncopation, Syncope, Ischemic Cardiovascular Disease, STEMI, STEMI (ST Elevation MI), Atrial Fibrillation (AF), Atrial Enlargement, LVF, Conduction Defect, Conduction Abnormalities, Heart Block, Valvular Diseases, Cardiac Output, Low, Stroke Volume, Stroke Volume Variation, Hyperkalemia, Hypercalcemia, Hypocalcemia, LV Dysfunction, QT Prolongation, Sudden Cardiac Death Due to Cardiac Arrhythmia, Ventricular Arrhythmia, Pacing, Pacing Induced Dyssynchrony, Silent Ischemia, Pericarditis, Sleep Related Breathing Disorder, RSA, Apnea, Obstructive, Cardiac Output Measurement, Respiratory Impedance, CRT And/or ICD, Infarction, Cardiomyopathies, Primary, Hypertrophy
Interventions
SUBPROTOCOL A, SUBPROTOCOL B, SUBPROTOCOL C, SUBPROTOCOL D, SUBPROTOCOL E, SUBPROTOCOL F, SUBPROTOCOL G, SUBPROTOCOL H
Device
Lead sponsor
Peerbridge Health, Inc
Industry
Eligibility
18 Years and older
Enrollment
15,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Melbourne, Florida
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
Conditions
Orthostatic Hypotension, Reflex Syncope
Interventions
Wearable holter monitor
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Rochester, Minnesota
Completed No phase listed Observational

The U.K. Embryologist Fatigue Study

NCT05708963
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
123 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
New York, New York
Recruiting No phase listed Observational Accepts healthy volunteers

Biospecimen Repository for Cardiac Arrhythmias at the Cleveland Clinic

NCT00921986
Conditions
Arrhythmias, Cardiac
Interventions
Not listed
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2035
U.S. locations
1
States / cities
Cleveland, Ohio
Completed Not applicable Interventional Results available

Syncope Decision Aid for Emergency Care

NCT02971163
Conditions
Syncope
Interventions
SynDA
Behavioral
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
30 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
New York, New York