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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Conduction Defect Clear all
Completed No phase listed Observational

Imaging Cardiac Electrical Remodeling With Electrocardiogram Imaging (ECGI)

NCT00785564
View directory record Official record
Conditions
Sick Sinus Syndrome
Interventions
Not listed
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 7, 2019 · Synced Jul 21, 2026, 6:55 PM EDT
Terminated No phase listed Observational

The Use of CT to Identify Damaged Heart Muscle in Patients Undergoing Ventricular Tachycardia Ablation.

NCT00583284
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Not listed
Lead sponsor
The Cleveland Clinic
Other
Eligibility
21 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 19, 2017 · Synced Jul 21, 2026, 6:55 PM EDT
Completed Not applicable Interventional Results available

Ablation at Virtual-hEart pRedicted Targets for VT

NCT03536052
View directory record Official record
Conditions
Ventricular Tachycardia, Ischemic Cardiomyopathy
Interventions
Virtual Heart Guided Ablation
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Jul 21, 2026, 6:55 PM EDT
Completed Phase 4 Interventional

Antiarrhythmics or Ablation for Ventricular Tachycardia 2

NCT02830360
View directory record Official record
Conditions
Ventricular Tachycardia (VT)
Interventions
Antiarrythmic Drug Therapy, Catheter ablation
Drug · Procedure
Lead sponsor
John Sapp
Other
Eligibility
18 Years and older
Enrollment
416 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2024
U.S. locations
2
States / cities
Hartford, Connecticut • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 31, 2024 · Synced Jul 21, 2026, 6:55 PM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Long QT Syndrome Screening in Newborns

NCT02412709
View directory record Official record
Conditions
Long QT Syndrome
Interventions
QTScreen ECG Recorder
Device
Lead sponsor
QT Medical, Inc.
Other
Eligibility
2 Weeks to 4 Weeks
Enrollment
4,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
3
States / cities
Lynwood, California • Torrance, California
Source: ClinicalTrials.gov public record
Updated Sep 27, 2016 · Synced Jul 21, 2026, 6:55 PM EDT
Active, not recruiting No phase listed Observational

Enlighten Study: The EV-ICD Post Approval Registry

NCT06048731
View directory record Official record
Conditions
Ventricular Arrhythmia, Tachycardia
Interventions
Defibrillation using EV-ICD
Device
Lead sponsor
Medtronic
Industry
Eligibility
Not listed
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2037
U.S. locations
57
States / cities
Huntington Park, California • Redwood City, California • San Diego, California + 45 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2025 · Synced Jul 21, 2026, 6:55 PM EDT
Completed No phase listed Observational

Extended ECG Monitoring in HCM Patients

NCT04056715
View directory record Official record
Conditions
Hypertrophic Cardiomyopathy, Nonsustained Ventricular Tachycardia, Ventricular Tachycardia, Atrial Fibrillation, Arrhythmia
Interventions
Zio XT
Device
Lead sponsor
iRhythm Technologies, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 28, 2023 · Synced Jul 21, 2026, 6:55 PM EDT
Recruiting Phase 3 Interventional

Surveillance and Treatment to Prevent Fetal Atrioventricular Block Likely to Occur Quickly (STOP BLOQ)

NCT04474223
View directory record Official record
Conditions
AVB - Atrioventricular Block, Fetal AVB
Interventions
Dexamethasone, IVIG
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older · Female only
Enrollment
1,300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2029
U.S. locations
23
States / cities
Phoenix, Arizona • Los Angeles, California • Palo Alto, California + 17 more
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Jul 21, 2026, 6:55 PM EDT
Completed No phase listed Observational

Circulating Biomarkers and Ventricular Tachyarrhythmia

NCT01892462
View directory record Official record
Conditions
Cardiomyopathy, Ventricular Tachycardia, Ventricular Fibrillation
Interventions
Not listed
Lead sponsor
Ochsner Health System
Other
Eligibility
18 Years and older
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Apr 6, 2017 · Synced Jul 21, 2026, 6:55 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Mayo AVC Registry and Biobank

NCT03049254
View directory record Official record
Conditions
Arrhythmogenic Right Ventricular Cardiomyopathy, Cardiomyopathies, Heart Diseases, Cardiovascular Diseases, Sudden Cardiac Arrest, Sudden Cardiac Death, Arrhythmogenic Right Ventricular Dysplasia, Arrhythmogenic Ventricular Cardiomyopathy, Familial Dilated Cardiomyopathy, Cardiovascular Abnormalities, Sarcoidosis, Cardiac Arrhythmia, Cardiac Sarcoidosis, Myocarditis, Inflammatory Cardiomyopathy, Ventricular Tachycardia, Right Ventricular Outflow Tract Ventricular Tachycardia
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
Not listed
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Jul 21, 2026, 6:55 PM EDT
Active, not recruiting No phase listed Observational

Longitudinal Evaluation of Active-Duty Personnel with Accessory Pathways (LEAD-AP)

NCT06798961
View directory record Official record
Conditions
Cardiac Death, Cardiac Death, Sudden, Wolf Parkinson White Syndrome
Interventions
Ablation, Standard of care without ablation
Procedure
Lead sponsor
United States Naval Medical Center, San Diego
Federal
Eligibility
18 Years to 40 Years
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Mar 13, 2025 · Synced Jul 21, 2026, 6:55 PM EDT
Completed No phase listed Observational

Precision Event Monitoring for Patients With Heart Failure Using HeartLogic

NCT03579641
View directory record Official record
Conditions
Heart Failure, Defibrillators, Implantable, Monitoring, Physiologic, Cardiac Resynchronization Therapy, Cardiovascular Disease, Heart Disease
Interventions
HeartLogic Sensors
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
2,184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
56
States / cities
Birmingham, Alabama • Jonesboro, Arkansas • Little Rock, Arkansas + 48 more
Source: ClinicalTrials.gov public record
Updated Oct 24, 2022 · Synced Jul 21, 2026, 6:55 PM EDT
Not listed Phase 4 Interventional

Effect of Ivabradine in Stage D HF/Cardiogenic Shock Patients on Dobutamine

NCT03387605
View directory record Official record
Conditions
Heart Failure, Cardiogenic Shock, Tachycardia
Interventions
Ivabradine, Placebo
Drug
Lead sponsor
Loyola University
Other
Eligibility
18 Years to 99 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated May 22, 2019 · Synced Jul 21, 2026, 6:55 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Dobutamine on the Cardiac Conduction System

NCT04249258
View directory record Official record
Conditions
Arrhythmias, Cardiac
Interventions
Dobutamine
Drug
Lead sponsor
Northwell Health
Other
Eligibility
18 Years to 80 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
New Hyde Park, New York
Source: ClinicalTrials.gov public record
Updated Jan 25, 2022 · Synced Jul 21, 2026, 6:55 PM EDT
Completed Not applicable Interventional Results available

Atropine in Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT)

NCT02927223
View directory record Official record
Conditions
Catecholaminergic Polymorphic Ventricular Tachycardia
Interventions
Atropine, Exercise treadmill test
Drug · Procedure
Lead sponsor
Vanderbilt University
Other
Eligibility
6 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 27, 2020 · Synced Jul 21, 2026, 6:55 PM EDT
Terminated Not applicable Interventional Results available

Randomized Double Blind Control Trial on Effects of Ranolazine on New Onset Atrial Fibrillation

NCT01590979
View directory record Official record
Conditions
Atrial Fibrillation New Onset, Hemorrhage, Prolonged QTc Interval, Ventricular Tachycardia, Medical Care; Complications, Late Effect of Complications
Interventions
Ranolazine, Placebo
Drug
Lead sponsor
Northwell Health
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Staten Island, New York
Source: ClinicalTrials.gov public record
Updated Mar 22, 2017 · Synced Jul 21, 2026, 6:55 PM EDT
Recruiting Not applicable Interventional

BIOTRONIK Investigation of the LivIQ Leadless Pacemaker System

NCT07118358
View directory record Official record
Conditions
Leadless Pacemaker, Bradycardia, AV Block, Cardiac Rhythm Disorder
Interventions
LivIQ Leadless Pacemaker System
Device
Lead sponsor
Biotronik, Inc.
Industry
Eligibility
18 Years and older
Enrollment
325 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
5
States / cities
Ypsilanti, Michigan • New York, New York • Winston-Salem, North Carolina + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Jul 21, 2026, 6:55 PM EDT
Enrolling by invitation No phase listed Observational

Lead Evaluation for Defibrillation and Reliability Post Approval Study

NCT07005232
View directory record Official record
Conditions
Tachyarrhythmia
Interventions
defibrillation lead
Device
Lead sponsor
Medtronic
Industry
Eligibility
Not listed
Enrollment
2,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2032
U.S. locations
46
States / cities
Birmingham, Alabama • Torrance, California • Aurora, Colorado + 39 more
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Jul 21, 2026, 6:55 PM EDT
Completed No phase listed Observational Results available

EnSite Precision Observational Study

NCT03260244
View directory record Official record
Conditions
Cardiac Arrhythmia
Interventions
cardiac mapping and radiofrequency ablation procedure
Procedure
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
1,065 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
7
States / cities
Birmingham, Alabama • Jonesboro, Arkansas • Little Rock, Arkansas + 4 more
Source: ClinicalTrials.gov public record
Updated Nov 7, 2024 · Synced Jul 21, 2026, 6:55 PM 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 Jul 21, 2026, 6:55 PM EDT
Completed No phase listed Observational Results available

Physiologic Pacing Registry

NCT03719040
View directory record Official record
Conditions
Bradycardia, Sinus Node Dysfunction, Heart Block, Syncope, Cardiomyopathies, Ventricular Tachycardia, Heart Failure
Interventions
Physiologic pacing device implant
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
870 participants
Timeline
2018 – 2021
U.S. locations
26
States / cities
Huntsville, Alabama • Burlingame, California • San Diego, California + 22 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2024 · Synced Jul 21, 2026, 6:55 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Defining the Risk of Ventricular Tachycardia in Genetic Forms of Early-onset Atrial Fibrillation

NCT06647459
View directory record Official record
Conditions
Ventricular Tachycardia, Atrial Fibrillation
Interventions
EP Study
Diagnostic Test
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Jul 21, 2026, 6:55 PM EDT
Withdrawn Early Phase 1 Interventional

Comparison of Ventricular Tachycardia Ablation Strategies in Patients With Ischemic Cardiomyopathy

NCT04512911
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Endocardial ablation, Endocardial- Epicardial ablation, Antiarrhythmic medications
Procedure · Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years to 99 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 5, 2023 · Synced Jul 21, 2026, 6:55 PM EDT
Completed Phase 4 Interventional Results available

Antiarrhythmic Effects of Spironolactone in Patients With ICDs

NCT04495712
View directory record Official record
Conditions
Ventricular Arrhythmias
Interventions
spironolactone, placebo
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
2004 – 2008
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Oct 8, 2020 · Synced Jul 21, 2026, 6:55 PM EDT