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ClinicalTrials.gov public records Last synced Sep 1, 2026, 11:42 AM EDT

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Showing 1–24 of 382 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Cardiac Conduction System Disease Clear all
Completed No phase listed Observational

Multicenter Evaluation of Children and Young Adults With Genotype Positive Long QT Syndrome

NCT01705925
View directory record Official record
Conditions
Long QT Syndrome
Interventions
Not listed
Lead sponsor
Pediatrix
Other
Eligibility
Up to 20 Years
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated May 5, 2019 · Synced Sep 1, 2026, 11:42 AM EDT
Recruiting Not applicable Interventional

Safety and Performance Assessment of the Sphere-9™ Catheter and Affera™ Ablation System for the Treatment of Ventricular Tachycardia (Sphere-9 VT EFS)

NCT06703489
View directory record Official record
Conditions
Ventricular Tachycardia (VT)
Interventions
Sphere-9 Catheter with the Affera Mapping and Ablation System
Device
Lead sponsor
Medtronic Cardiac Ablation Solutions
Industry
Eligibility
18 Years to 85 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
6
States / cities
Boston, Massachusetts • New York, New York • Cleveland, Ohio + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Sep 1, 2026, 11:42 AM EDT
Recruiting Not applicable Interventional

Saline Enhanced Radiofrequency (SERF) Needle Ablation for Refractory VT

NCT05337241
View directory record Official record
Conditions
Refractory Ventricular Tachycardia
Interventions
Saline Enhanced Radiofrequency (SERF) Ablation
Device
Lead sponsor
Thermedical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
5
States / cities
Birmingham, Alabama • Philadelphia, Pennsylvania • Charleston, South Carolina + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 13, 2025 · Synced Sep 1, 2026, 11:42 AM EDT
Recruiting Not applicable Interventional

Electroanatomic Interactions Between Transcatheter Pulmonary Valve Prostheses and Anatomic Isthmuses in Repaired Tetralogy of Fallot

NCT05236153
View directory record Official record
Conditions
Tetralogy of Fallot, Ventricular Tachycardia, Sudden Cardiac Death
Interventions
Electroanatomic substrate mapping
Diagnostic Test
Lead sponsor
Boston Children's Hospital
Other
Eligibility
Not listed
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 7, 2023 · Synced Sep 1, 2026, 11:42 AM EDT
Active, not recruiting No phase listed Observational

Cardiac Implantable Electronic Device (CIED) Research Study

NCT05061862
View directory record Official record
Conditions
Arrhythmias, Cardiac, Bradycardia, Tachycardia
Interventions
cardiac implantable electronic devices (CIEDs)
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
1,000 participants
Timeline
2022 – 2026
U.S. locations
8
States / cities
Gainesville, Florida • Macon, Georgia • Portland, Oregon + 5 more
Source: ClinicalTrials.gov public record
Updated Dec 9, 2025 · Synced Sep 1, 2026, 11:42 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 May 31, 2026 · Synced Sep 1, 2026, 11:42 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 17, 2025 · Synced Sep 1, 2026, 11:42 AM EDT
Recruiting No phase listed Observational

AVEIR DR Coverage With Evidence Development (CED) Study

NCT05932602
View directory record Official record
Conditions
Cardiac Pacemaker, Arrythmia, Bradycardia
Interventions
Aveir DR Leadless Pacemaker System, Dual Chamber Transvenous Pacemaker
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
2,812 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2030
U.S. locations
1
States / cities
Sylmar, California
Source: ClinicalTrials.gov public record
Updated Apr 5, 2025 · Synced Sep 1, 2026, 11:42 AM EDT
Recruiting Not applicable Interventional

Continuous Versus Intermittent cARdiac Electrical moNitorinG

NCT04336644
View directory record Official record
Conditions
Torsades de Pointe Caused by Drug, Long QT Syndrome
Interventions
BodyGuardian Mini Plus
Device
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 29, 2025 · Synced Sep 1, 2026, 11:42 AM EDT
Terminated Phase 3 Interventional Results available

Efficacy and Safety of Etripamil for the Termination of Spontaneous Paroxysmal Supraventricular Tachycardia (PSVT).

NCT03464019
View directory record Official record
Conditions
Paroxysmal Supraventricular Tachycardia
Interventions
Etripamil, Placebo, Etripamil Test Dose
Drug
Lead sponsor
Milestone Pharmaceuticals Inc.
Other
Eligibility
18 Years and older
Enrollment
1,097 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
54
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Cerritos, California + 44 more
Source: ClinicalTrials.gov public record
Updated Jul 11, 2024 · Synced Sep 1, 2026, 11:42 AM EDT
Recruiting Not applicable Interventional

Left vs Left Randomized Clinical Trial

NCT05650658
View directory record Official record
Conditions
Heart Failure, Heart Failure With Reduced Ejection Fraction, AV Block, LBBB, RBBB, Intraventricular Conduction Delay, Pacing-Induced Cardiomyopathy
Interventions
His/LBBP, BiVP
Device
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years and older
Enrollment
2,136 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
57
States / cities
Gilbert, Arizona • Tucson, Arizona • Little Rock, Arkansas + 46 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2025 · Synced Sep 1, 2026, 11:42 AM EDT
Terminated No phase listed Observational

Infant Medical Records: Case Report Proposal

NCT00268060
View directory record Official record
Conditions
Congenital Disorders
Interventions
Not listed
Lead sponsor
Children's Healthcare of Atlanta
Other
Eligibility
Up to 21 Years · Male only
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2004
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated May 6, 2007 · Synced Sep 1, 2026, 11:42 AM EDT
Terminated Phase 2 Interventional Results available

Treatment of Ventricular Tachyarrhythmias Refractory To Shock With Beta Blockers: The SHOCK and BLOCK Trial

NCT00401882
View directory record Official record
Conditions
Cardiac Arrest, Sudden Cardiac Death, Ventricular Fibrillation, Tachycardia, Ventricular
Interventions
Epinephrine, Metoprolol
Drug
Lead sponsor
David Haines, MD
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Royal Oak, Michigan
Source: ClinicalTrials.gov public record
Updated May 24, 2017 · Synced Sep 1, 2026, 11:42 AM EDT
Recruiting Not applicable Interventional

His-Bundle Corrective Pacing in Heart Failure

NCT05265520
View directory record Official record
Conditions
Right Bundle-Branch Block, Heart Failure, His-bundle Pacing, Cardiac Resynchronization Therapy
Interventions
His-CRT implantation, BIV-CRT implantation
Procedure
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
14
States / cities
Phoenix, Arizona • Los Angeles, California • Tampa, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Feb 8, 2026 · Synced Sep 1, 2026, 11:42 AM EDT
Completed Not applicable Interventional Results available

Micra Atrial TRacking Using A Ventricular AccELerometer 2

NCT03752151
View directory record Official record
Conditions
Atrioventricular Conduction Block
Interventions
MARVEL 2 Algorithm Monitor Mode then Adaptive Mode
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
5
States / cities
Jacksonville, Florida • Miami, Florida • Manhasset, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 3, 2020 · Synced Sep 1, 2026, 11:42 AM EDT
Terminated No phase listed Observational

A Registry to Determine the Clinical and Genetic Risk Factors for Torsade De Pointes

NCT02439645
View directory record Official record
Conditions
Long qt Syndrome, Torsade de Pointes
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
4
States / cities
Boston, Massachusetts • West Roxbury, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 2, 2021 · Synced Sep 1, 2026, 11:42 AM EDT
Completed Phase 2 Interventional Results available

Long-term Efficacy Study of Sodium Channel Blocker in LQT3 Patients

NCT01648205
View directory record Official record
Conditions
Long QT Syndrome
Interventions
Placebo, Ranolazine
Drug
Lead sponsor
University of Rochester
Other
Eligibility
21 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 6, 2022 · Synced Sep 1, 2026, 11:42 AM EDT
Not listed No phase listed Observational

Outcomes of Functional Substrate Mapping of Ventricular Tachycardia

NCT05708131
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Not listed
Lead sponsor
Mid and South Essex NHS Foundation Trust
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 11, 2024 · Synced Sep 1, 2026, 11:42 AM EDT
Terminated Not applicable Interventional

Unpinning Termination Therapy for VT (US)

NCT03093051
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Unpinning Termination therapy
Device
Lead sponsor
Cardialen, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
7
States / cities
Sacramento, California • Des Moines, Iowa • Minneapolis, Minnesota + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2022 · Synced Sep 1, 2026, 11:42 AM EDT
Completed No phase listed Observational

Effects Rapid Atrial Pacing Has on the Electrocardiogram (ECG) in Patients With Dual Chamber Pacemakers

NCT00883610
View directory record Official record
Conditions
Prolonged QT Interval
Interventions
Not listed
Lead sponsor
Vanderbilt University
Other
Eligibility
21 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 10, 2014 · Synced Sep 1, 2026, 11:42 AM EDT
Completed Not applicable Interventional

Conduction Disease After Transcatheter Aortic Valve Replacement

NCT04489095
View directory record Official record
Conditions
Aortic Stenosis, Heart Block, Aortic Insufficiency
Interventions
Electrophysiology Study
Diagnostic Test
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years and older
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 13, 2022 · Synced Sep 1, 2026, 11:42 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Effect of Therapeutic and Supratherapeutic Oral Doses of GSK3640254 on Cardiac Conduction Compared to Placebo and a Single Oral Dose of Moxifloxacin

NCT04563845
View directory record Official record
Conditions
HIV Infections
Interventions
GSK3640254, Placebo, Moxifloxacin
Drug
Lead sponsor
ViiV Healthcare
Industry
Eligibility
18 Years to 50 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Dec 5, 2023 · Synced Sep 1, 2026, 11:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Caffeine on Heart Function

NCT02401776
View directory record Official record
Conditions
Fatigue, Tachycardia
Interventions
Monster Energy Drink, Coffee
Dietary Supplement
Lead sponsor
University of Texas at Austin
Other
Eligibility
18 Years to 35 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Oct 17, 2016 · Synced Sep 1, 2026, 11:42 AM EDT
Terminated Phase 2Phase 3 Interventional Results available

Specialized Pacing for Patients With Congenital Heart Disease

NCT03361189
View directory record Official record
Conditions
Congenital Heart Disease, Bradycardia Sinus
Interventions
Closed loop stimulation, Standard rate response
Device
Lead sponsor
University of California, Los Angeles
Other
Eligibility
14 Years to 65 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 19, 2023 · Synced Sep 1, 2026, 11:42 AM EDT