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ClinicalTrials.gov public records Last synced Oct 24, 2026, 8:20 PM EDT

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Showing 25–48 of 370 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Conduction Defects Clear all
Not listed No phase listed Observational

Gut Microbiome and Ventricular Arrhythmias

NCT04466072
View directory record Official record
Conditions
Ventricular Tachycardia, Ventricular Fibrillation, Gut Microbiome
Interventions
Stool test for microbial analysis
Diagnostic Test
Lead sponsor
North Florida Foundation for Research and Education
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 18, 2022 · Synced Oct 24, 2026, 8:20 PM EDT
Terminated No phase listed Observational

Catheter Ablation of Ventricular Arrhythmia Reduces Skin Sympathetic Activity

NCT04837183
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 3, 2024 · Synced Oct 24, 2026, 8:20 PM EDT
Terminated No phase listed Observational

Radiofrequency Ablation of Ectopic Atrial Tachycardia

NCT00267982
View directory record Official record
Conditions
Congenital Disorders
Interventions
Not listed
Lead sponsor
Children's Healthcare of Atlanta
Other
Eligibility
Up to 21 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1992 – 2008
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 6, 2011 · Synced Oct 24, 2026, 8:20 PM EDT
Recruiting No phase listed Observational

Product Performance Report: Evaluate Long-term Reliability & Performance of Medtronic Marketed Cardiac Therapy Products

NCT00271180
View directory record Official record
Conditions
Arrhythmia, Bradycardia, Heart Failure, Sinus Tachycardia
Interventions
Device
Device
Lead sponsor
Medtronic
Industry
Eligibility
Not listed
Enrollment
20,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1983 – 2040
U.S. locations
113
States / cities
Birmingham, Alabama • Anchorage, Alaska • Chandler, Arizona + 110 more
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Oct 24, 2026, 8:20 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Biospecimen Repository for Cardiac Arrhythmias at the Cleveland Clinic

NCT00921986
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Sep 14, 2026 · Synced Oct 24, 2026, 8:20 PM 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 24, 2026, 8:20 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study Evaluating the Effects of Multiple Oral Doses of ERB-041 on Cardiac Repolarization in Healthy Subjects

NCT00316459
View directory record Official record
Conditions
Healthy, Long QT Syndrome
Interventions
ERB-041
Drug
Lead sponsor
Wyeth is now a wholly owned subsidiary of Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2006
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Apr 13, 2007 · Synced Oct 24, 2026, 8:20 PM EDT
Completed No phase listed Observational

Novel Cardiac Signal Processing System

NCT04112433
View directory record Official record
Conditions
Cardiac Arrhythmia
Interventions
PURE EP 2
Device
Lead sponsor
BioSig Technologies, Inc.
Industry
Eligibility
18 Years and older
Enrollment
104 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
3
States / cities
Jacksonville, Florida • Boston, Massachusetts • Austin, Texas
Source: ClinicalTrials.gov public record
Updated Feb 11, 2022 · Synced Oct 24, 2026, 8:20 PM EDT
Completed No phase listed Observational

The Signal-averaged ElectrocArdiogram in Long Term Follow-up of Chronic CHagas Disease - RIO de Janeiro Cohort

NCT01340963
View directory record Official record
Conditions
Chagas Cardiomyopathy, Cardiac Arrhythmia, Stroke, Left Ventricular Function Systolic Dysfunction, Cardiac Death
Interventions
Not listed
Lead sponsor
Universidade Gama Filho
Other
Eligibility
18 Years to 75 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 10, 2013 · Synced Oct 24, 2026, 8:20 PM EDT
Completed Not applicable Interventional

SERF VT Ablation Early Feasibility Study (EFS)

NCT03628534
View directory record Official record
Conditions
Ventricular Tachycardia, Arrythmia, Heart Diseases, Cardiovascular Diseases
Interventions
Saline Enhanced Radiofrequency (SERF) ablation
Device
Lead sponsor
Thermedical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
3
States / cities
Maywood, Illinois • Rochester, Minnesota • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 10, 2022 · Synced Oct 24, 2026, 8:20 PM EDT
Completed No phase listed Observational

Parallel Mapping for Ventricular Tachycardia

NCT04477499
View directory record Official record
Conditions
Ventricular Tachycardia (V-Tach), Implantable Cardioverter Defibrillator (ICD), Arrythmia
Interventions
Not listed
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 10, 2023 · Synced Oct 24, 2026, 8:20 PM EDT
Completed Not applicable Interventional Results available

Reducing Episodes by Septal Pacing Efficacy Confirmation Trial (RESPECT)

NCT00289289
View directory record Official record
Conditions
Atrial Fibrillation, Tachycardia, Supraventricular, Arrhythmia, Bradycardia
Interventions
Intervention Pacing Features
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
Not listed
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2011
U.S. locations
34
States / cities
Little Rock, Arkansas • Rancho Mirage, California • San Diego, California + 31 more
Source: ClinicalTrials.gov public record
Updated Aug 8, 2012 · Synced Oct 24, 2026, 8:20 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

HeartBeam ECG Registry

NCT07501299
View directory record Official record
Conditions
Atrial Fibrillation, Atrial Flutter, Bradycardia, Tachycardia, Arrhythmia
Interventions
Electrocardiogram (ECG)
Diagnostic Test
Lead sponsor
HeartBeam, Inc.
Industry
Eligibility
18 Years and older
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Oct 24, 2026, 8:20 PM EDT
Completed Not applicable Interventional Results available

Intramural Needle Ablation for Ablation of Recurrent Ventricular Tachycardia

NCT01791543
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Intramural Needle Ablation Catheter
Device
Lead sponsor
William Stevenson
Other
Eligibility
18 Years and older
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
2
States / cities
Boston, Massachusetts • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 1, 2023 · Synced Oct 24, 2026, 8:20 PM EDT
Completed Phase 3 Interventional

Etripamil Nasal Spray in Patients With Paroxysmal Supraventricular Tachycardia

NCT04952610
View directory record Official record
Conditions
Paroxysmal Supraventricular Tachycardia
Interventions
Etripamil NS 70 mg, Aptar Pharma Nasal Spray Bidose System
Drug · Device
Lead sponsor
Milestone Pharmaceuticals Inc.
Other
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
17
States / cities
Little Rock, Arkansas • Vista, California • West Hills, California + 14 more
Source: ClinicalTrials.gov public record
Updated May 15, 2026 · Synced Oct 24, 2026, 8:20 PM EDT
Terminated Not applicable Interventional

Ablation of Inappropriate Sinus Tachycardia

NCT00584649
View directory record Official record
Conditions
Inappropriate Sinus Tachycardia
Interventions
electrophysiology study and radiofrequency ablation
Procedure
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 80 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2020
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 1, 2024 · Synced Oct 24, 2026, 8:20 PM EDT
Active, not 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 Aug 25, 2026 · Synced Oct 24, 2026, 8:20 PM 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 14, 2022 · Synced Oct 24, 2026, 8:20 PM EDT
Completed Not applicable Interventional

Optimal Coronary Sinus Lead Implantation Using Intracardiac Impedography and Magnetic Resonance Imaging

NCT01129635
View directory record Official record
Conditions
Heart Failure, Systolic, Left Bundle Branch Block
Interventions
Cardiac Resynchronization Therapy (CRT) implantation
Procedure
Lead sponsor
Emory University
Other
Eligibility
Not listed
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 21, 2015 · Synced Oct 24, 2026, 8:20 PM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

COR-INSIGHT: Optimizing Cardiovascular and Cardiopulmonary Outcomes with AI-Driven Multiplexed Indications Using COR ECG Wearable

NCT06763549
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jan 8, 2025 · Synced Oct 24, 2026, 8:20 PM 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 24, 2026, 8:20 PM 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 24, 2026, 8:20 PM EDT
Completed Not applicable Interventional Results available

Vest Prevention of Early Sudden Death Trial and VEST Registry

NCT01446965
View directory record Official record
Conditions
Myocardial Infarction, Ventricular Dysfunction, Sudden Death, Ventricular Tachycardia, Ventricular Fibrillation
Interventions
wearable defibrillator
Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
2,348 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2019
U.S. locations
57
States / cities
Anchorage, Alaska • Fresno, California • Salinas, California + 47 more
Source: ClinicalTrials.gov public record
Updated Jan 20, 2021 · Synced Oct 24, 2026, 8:20 PM EDT
Completed Not applicable Interventional Results available

MADIT-CRT: Multicenter Automatic Defibrillator Implantation With Cardiac Resynchronization Therapy

NCT00180271
View directory record Official record
Conditions
Tachycardia, Congestive Heart Failure
Interventions
Cardiac resynchronization therapy with defibrillation, Implantable Cardioverter Defibrillator (ICD)
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
21 Years and older
Enrollment
1,820 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Dec 19, 2018 · Synced Oct 24, 2026, 8:20 PM EDT