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ClinicalTrials.gov public records Last synced Oct 17, 2026, 7:36 AM EDT

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Showing 1–24 of 384 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Cardiac Conduction System Disease Clear all
Completed Not applicable Interventional Results available

Long QT Syndrome and Sleep Apnea

NCT03678311
View directory record Official record
Conditions
Long QT Syndrome, Sleep Apnea
Interventions
Continuous Positive Airway Pressure (CPAP)
Device
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 2, 2020 · Synced Oct 17, 2026, 7:36 AM EDT
Recruiting No phase listed Observational

Cardioneuroablation for Recurrent Vasovagal Syncope and Bradyarrhythmias: The CNA-FWRD Registry

NCT06166277
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Sep 18, 2025 · Synced Oct 17, 2026, 7:36 AM EDT
Completed Not applicable Interventional

SAVEPACe - Search AV Extension and Managed Ventricular Pacing for Promoting Atrio-Ventricular Conduction

NCT00284830
View directory record Official record
Conditions
Sick Sinus Syndrome, Heart Failure, Congestive, Atrial Fibrillation, Bradycardia, Ventricular Dysfunction
Interventions
Implantable Pulse Generators
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
1,070 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
63
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Conway, Arkansas + 60 more
Source: ClinicalTrials.gov public record
Updated Feb 29, 2008 · Synced Oct 17, 2026, 7:36 AM EDT
Completed No phase listed Observational Results available

Ondansetron and the QT Interval In Adult Emergency Department Patients

NCT01759420
View directory record Official record
Conditions
Ondansetron
Interventions
Ondansetron
Drug
Lead sponsor
C.R.Darnall Army Medical Center
Federal
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
2
States / cities
Fort Hood, Texas • Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Jun 26, 2014 · Synced Oct 17, 2026, 7:36 AM EDT
Completed Phase 2 Interventional

Double Blind Placebo Controlled Dose Ranging Study of the Efficacy and Safety of SSR149744c 100 or 300 mg for the Prevention of ventrICular ARrhythmia-triggered Icd interventiOnS

NCT00232297
View directory record Official record
Conditions
Arrhythmia, Tachycardia, Ventricular, Ventricular Fibrillation
Interventions
SSR149744C
Drug
Lead sponsor
Sanofi
Industry
Eligibility
21 Years and older
Enrollment
153 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Bridgewater, New Jersey
Source: ClinicalTrials.gov public record
Updated May 8, 2012 · Synced Oct 17, 2026, 7:36 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 17, 2026, 7:36 AM EDT
Completed Phase 4 Interventional Results available

RIGHT: Rhythm ID Going Head-to-Head Trial

NCT00148954
View directory record Official record
Conditions
Tachycardia
Interventions
VITALITY 2 Implantable Cardioverter Defibrillator, Medtronic Implantable Cardioverter Defibrillator
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
1,962 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 12, 2012 · Synced Oct 17, 2026, 7:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Oral GS-6615 on Dofetilide-Induced QT Prolongation, Safety, and Tolerability in Healthy Adults

NCT02365532
View directory record Official record
Conditions
Long QT Syndrome
Interventions
GS-6615, Placebo to match GS-6615, Placebo to match dofetilide, Dofetilide
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years to 40 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 20, 2015 · Synced Oct 17, 2026, 7:36 AM EDT
Not listed Not applicable Interventional

Transcutaneous Vagal Nerve Stimulation to Prevent Tachyarrhythmias in Patients Early Following Myocardial Infarction

NCT05750108
View directory record Official record
Conditions
Myocardial Infarction, Tachyarrhythmia
Interventions
Parasym device (active, current (mA) < discomfort threshold), Parasym device (sham, current (mA) = 0)
Device
Lead sponsor
Hippocration General Hospital
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Mar 1, 2023 · Synced Oct 17, 2026, 7:36 AM EDT
Withdrawn Not applicable Interventional

Atrial Fibrillation Rate Control Therapy Guided By Continuous Ambulatory Monitoring

NCT00115843
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
Mobile Cardiac Outpatient Telemetry
Device
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 5, 2017 · Synced Oct 17, 2026, 7:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Study to Evaluate the Effect of Bepirovirsen on Cardiac Conduction as Assessed by 12-lead Electrocardiogram in Healthy Volunteers

NCT06422767
View directory record Official record
Conditions
Hepatitis B
Interventions
Bepirovirsen, Placebo
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 55 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jul 10, 2026 · Synced Oct 17, 2026, 7:36 AM EDT
Completed Not applicable Interventional Results available

Imaging With a Radio Tracer to Guide VT Ablations

NCT01250912
View directory record Official record
Conditions
Ventricular Tachycardia, Arrhythmia
Interventions
123I-metaiodobenzylguanidine
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2019
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 27, 2022 · Synced Oct 17, 2026, 7:36 AM EDT
Withdrawn Phase 3 Interventional

Vagal Nerve Stimulation as an Alternative Therapy for Premature Ventricular Contractions

NCT06110364
View directory record Official record
Conditions
Premature Ventricular Contraction
Interventions
Low-Level Tragus Stimulation, Heart Rate Variability- Biofeedback, Conventional Medical Therapy
Device · Behavioral · Other
Lead sponsor
Hunter Holmes Mcguire Veteran Affairs Medical Center
Federal
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Oct 26, 2024 · Synced Oct 17, 2026, 7:36 AM EDT
Recruiting No phase listed Observational

Genetic Markers of Cardiovascular Disease in Epilepsy

NCT02824822
View directory record Official record
Conditions
Epilepsy, Seizures, Syncope, Channelopathy, Cardiomyopathies
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 50 Years
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2031
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 8, 2025 · Synced Oct 17, 2026, 7:36 AM EDT
Completed No phase listed Observational

NTX Wireless Patient Monitoring System

NCT00654693
View directory record Official record
Conditions
Desaturation, Bradycardia, Tachycardia, Hypertension, Hypotension
Interventions
Rapid Response Team
Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 7, 2012 · Synced Oct 17, 2026, 7:36 AM EDT
Terminated Not applicable Interventional Results available

Stepwise Approach To sUbstrate Modification for Ventricular Tachycardia

NCT01546207
View directory record Official record
Conditions
Ventricular Tachycardia, Catheter Ablation, Tachycardia, Ventricular
Interventions
catheter-based ablation
Procedure
Lead sponsor
Vivek Reddy
Other
Eligibility
18 Years to 90 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
6
States / cities
Birmingham, Alabama • Maywood, Illinois • Boston, Massachusetts + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2020 · Synced Oct 17, 2026, 7:36 AM EDT
Completed Not applicable Interventional

A Randomized Trial of Remote Monitoring of Implantable Cardioverter Defibrillators Versus Quarterly Device Interrogations in Clinic

NCT00606567
View directory record Official record
Conditions
Tachycardia, Ventricular, Ventricular Fibrillation
Interventions
Methods for monitoring patients with ICD's
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
151 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 14, 2014 · Synced Oct 17, 2026, 7:36 AM EDT
Recruiting Phase 2 Interventional

The NODE-202 Study (Study of Etripamil Nasal Spray in Pediatric Patients)

NCT05763953
View directory record Official record
Conditions
Paroxysmal Supraventricular Tachycardia
Interventions
Etripamil NS
Drug
Lead sponsor
Milestone Pharmaceuticals Inc.
Other
Eligibility
6 Years to 17 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
6
States / cities
Phoenix, Arizona • Oak Lawn, Illinois • Cincinnati, Ohio + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Oct 17, 2026, 7:36 AM EDT
Recruiting No phase listed Observational

Fetal Electrophysiologic Abnormalities in High-Risk Pregnancies Associated With Fetal Demise

NCT03775954
View directory record Official record
Conditions
High Risk Pregnancy, Congenital Heart Disease, Fetal Hydrops, Twin Monochorionic Monoamniotic Placenta, Gastroschisis, Fetal Demise, Stillbirth, Fetal Arrhythmia, Long QT Syndrome, Intrauterine Fetal Death, Sudden Infant Death, Pregnancy Loss, Twin Twin Transfusion Syndrome, Birth Defect, Fetal Cardiac Anomaly, Fetal Cardiac Disorder, Fetal Death, Brugada Syndrome, Fetal Tachycardia
Interventions
Fetal Magnetocardiogram and Neonatal Electrocardiogram, Substudy only: Maternal/Infant Pharmacogenomic assessment postnatally
Diagnostic Test · Genetic
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 4, 2026 · Synced Oct 17, 2026, 7:36 AM EDT
Recruiting Not applicable Interventional

Programmed Ventricular Stimulation to Risk Stratify for Early Cardioverter-Defibrillator (ICD) Implantation to Prevent Tachyarrhythmias Following Acute Myocardial Infarction (PROTECT-ICD)

NCT03588286
View directory record Official record
Conditions
Sudden Cardiac Death
Interventions
Electrophysiology study (EPS), Standard Care, Cardiac Magnetic Resonance (CMR)
Procedure · Other
Lead sponsor
Western Sydney Local Health District
Other
Eligibility
18 Years to 85 Years
Enrollment
1,058 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 7, 2024 · Synced Oct 17, 2026, 7:36 AM EDT
Completed No phase listed Observational

Stanford Cardiac Invasive Electrophysiology Novel Computer Experience

NCT03549806
View directory record Official record
Conditions
Atrial Fibrillation, Atrial Tachycardia, Atrial Flutter, Arrhythmias, Cardiac
Interventions
No Intervention. Test is computer algorithm.
Diagnostic Test
Lead sponsor
Stanford University
Other
Eligibility
21 Years to 80 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Dec 2, 2024 · Synced Oct 17, 2026, 7:36 AM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

QTc Study of Rosi XR in Healthy Volunteers

NCT00884533
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
Rosi XR, Placebo, Moxifloxacin
Drug · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 45 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Apr 17, 2015 · Synced Oct 17, 2026, 7:36 AM EDT
Completed No phase listed Observational

DF4 Connector System Post-Approval Study

NCT01638897
View directory record Official record
Conditions
Ventricular Tachycardia, Ventricular Fibrillation, Sudden Cardiac Death, Heart Failure
Interventions
Not listed
Lead sponsor
Medtronic
Industry
Eligibility
Not listed
Enrollment
1,778 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
72
States / cities
Birmingham, Alabama • Anchorage, Alaska • Gilbert, Arizona + 69 more
Source: ClinicalTrials.gov public record
Updated Mar 20, 2019 · Synced Oct 17, 2026, 7:36 AM EDT
Completed Not applicable Interventional Results available

REnal SympathetiC Denervation to sUpprEss Tachyarrhythmias in ICD Recipients

NCT01747837
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Boston Scientific Vessix Renal Denervation System
Device
Lead sponsor
Vivek Reddy
Other
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
2
States / cities
New York, New York • Austin, Texas
Source: ClinicalTrials.gov public record
Updated Mar 4, 2020 · Synced Oct 17, 2026, 7:36 AM EDT