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Showing 1–24 of 40 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: ICD lead implant Clear all
Completed No phase listed Observational Results available

Longitudinal Surveillance Study of the 4-SITE Lead/Header System

NCT01596595
View directory record Official record
Conditions
Primary Prevention of Sudden Cardiac Arrest, Secondary Prevention of Sudden Cardiac Arrest
Interventions
Not listed
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
Not listed
Enrollment
1,820 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2020
U.S. locations
104
States / cities
Anchorage, Alaska • Glendale, Arizona • Mesa, Arizona + 94 more
Source: ClinicalTrials.gov public record
Updated Mar 18, 2021 · Synced Sep 23, 2026, 6:19 AM EDT
Completed Not applicable Interventional Results available

Safety and Efficacy of Automatic Testing Feature in New ICDs and CRT-Ds

NCT00746356
View directory record Official record
Conditions
Heart Failure, Ventricular Arrythmias
Interventions
Testing of the autocapture features of the device
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
128 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
5
States / cities
Little Rock, Arkansas • Browns Mills, New Jersey • Nashville, Tennessee + 1 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2019 · Synced Sep 23, 2026, 6:19 AM EDT
Completed Not applicable Interventional

The Prevention of Myocardial Enlargement and Dilatation Post Myocardial Infarction Study

NCT00605631
View directory record Official record
Conditions
Post Myocardial Infarction
Interventions
Cardiac pacing using any Guidant/Boston Scientific Implantable ICD or CRT-D System and any Guidant/Boston Scientific Intracardiac Lead System
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years to 100 Years
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 4, 2017 · Synced Sep 23, 2026, 6:19 AM EDT
Completed Phase 4 Interventional

Tricuspid Regurgitation Study

NCT01093001
View directory record Official record
Conditions
Tricuspid Regurgitation, Right Ventricular Dysfunction, Left Ventricular Dysfunction
Interventions
Echo
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 90 Years
Enrollment
119 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 2, 2016 · Synced Sep 23, 2026, 6:19 AM EDT
Terminated Not applicable Interventional Results available

Pediatric Lead Extractability and Survival Evaluation (PLEASE)

NCT00335036
View directory record Official record
Conditions
Ventricular Tachycardia, Ventricular Fibrillation, Cardiomyopathy, Long QT Syndrome, Congenital Heart Disease
Interventions
ICD lead implant, Thin leads
Device
Lead sponsor
Charles Berul
Other
Eligibility
1 Year to 55 Years
Enrollment
748 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Sep 23, 2026, 6:19 AM EDT
Completed No phase listed Observational

Extension Phase of the Chronicle® Offers Management to Patients With Advanced Signs & Symptoms of Heart Failure Study

NCT00991120
View directory record Official record
Conditions
Heart Failure
Interventions
Chronicle Implantable Hemodynamic Monitor (IHM) System, Chronicle Implantable Cardioverter Defibrillator (ICD)
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
165 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
19
States / cities
Birmingham, Alabama • Springfield, Illinois • Fort Wayne, Indiana + 16 more
Source: ClinicalTrials.gov public record
Updated Nov 29, 2017 · Synced Sep 23, 2026, 6:19 AM EDT
Completed Not applicable Interventional Results available

Reducing Decompensation Events Utilizing Intracardiac Pressures in Patients With Chronic Heart Failure (HF) (REDUCEhf)

NCT00354159
View directory record Official record
Conditions
Heart Failure
Interventions
Implantable Hemodynamic Monitor (Chronicle® IHM), and IHM in combination with single chamber ICD (Chronicle ICD)
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
442 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
52
States / cities
Birmingham, Alabama • La Jolla, California • Loma Linda, California + 43 more
Source: ClinicalTrials.gov public record
Updated Aug 8, 2012 · Synced Sep 23, 2026, 6:19 AM EDT
Withdrawn Phase 2 Interventional

Patients With Patent Foramen Ovale and Endocardial Device Leads on Apixaban for Prevention of Paradoxical Emboli

NCT02378623
View directory record Official record
Conditions
Patent Foramen Ovale, Cardiac Implantable Electronic Device
Interventions
Apixaban, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 15, 2018 · Synced Sep 23, 2026, 6:19 AM EDT
Terminated No phase listed Observational Results available

Optisure Lead Post Approval Study

NCT02235545
View directory record Official record
Conditions
Heart Failure, Tachycardia, Ventricular
Interventions
St. Jude Medical Optisure Lead
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
1,735 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
46
States / cities
Birmingham, Alabama • Phoenix, Arizona • Jonesboro, Arkansas + 42 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2025 · Synced Sep 23, 2026, 6:19 AM EDT
Completed Not applicable Interventional Results available

Evaluation of ACUITY™ X4 Quadripolar Coronary Venous Leads and RELIANCE™ 4-FRONT Defibrillation Leads

NCT02071173
View directory record Official record
Conditions
Cardiac Resynchronization Therapy
Interventions
ACUITY X4 quadripolar coronary venous lead and RELIANCE 4-FRONT defibrillation lead
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
2,244 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
96
States / cities
Birmingham, Alabama • Huntsville, Alabama • Anchorage, Alaska + 85 more
Source: ClinicalTrials.gov public record
Updated Jan 6, 2021 · Synced Sep 23, 2026, 6:19 AM EDT
Not listed Not applicable Interventional

Insulation Failure in St. Jude Riata Leads

NCT02095977
View directory record Official record
Conditions
Implanted With Any Currently (and Any Future) FDA-approved Medtronic ICD or CRT Device, to Which is Attached a St. Jude Riata Lead
Interventions
fluoroscopy, synchronized high-voltage shock, Holter monitor
Procedure
Lead sponsor
Hartford Hospital
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Sep 23, 2026, 6:19 AM EDT
Terminated Not applicable Interventional Results available

Efficacy and Safety of Implantable Cardioverter-Defibrillator (ICD) Implantation in the Elderly

NCT02121158
View directory record Official record
Conditions
Cardiomyopathy, Coronary Artery Disease, Congestive Heart Failure, Myocardial Infarction
Interventions
Implantable Cardioverter Defibrillator, Optimal Medical Therapy
Device · Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
70 Years and older
Enrollment
167 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
5
States / cities
Washington D.C., District of Columbia • Gainesville, Florida • Minneapolis, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 30, 2024 · Synced Sep 23, 2026, 6:19 AM EDT
Completed Not applicable Interventional

Lead EvaluAtion for Defibrillation and Reliability (LEADR) / Lead Evaluation for Defibrillation and Reliability in Left Bundle Branch Area Pacing (LEADR LBBAP)

NCT04863664
View directory record Official record
Conditions
Tachyarrhythmia
Interventions
Defibrillation (RV Implant), Defibrillation (LBBAP Implant)
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
12 Years and older
Enrollment
998 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
23
States / cities
Huntsville, Alabama • Torrance, California • Hartford, Connecticut + 19 more
Source: ClinicalTrials.gov public record
Updated Dec 8, 2025 · Synced Sep 23, 2026, 6:19 AM EDT
Completed Phase 4 Interventional Results available

TRIAGE-CRT Telemonitoring in Patients With CHF and Indication of CRT-D

NCT00395642
View directory record Official record
Conditions
Congestive Heart Failure, Cardiac Resynchronization Therapy
Interventions
Kronos LV-T, Lumax HF-T
Device
Lead sponsor
Biotronik, Inc.
Industry
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
12
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Wilmington, Delaware + 9 more
Source: ClinicalTrials.gov public record
Updated Jan 19, 2010 · Synced Sep 23, 2026, 6:19 AM EDT
Completed No phase listed Observational

Conduction System Pacing International Registry (CONSPIRE)

NCT04831125
View directory record Official record
Conditions
Bradyarrhythmia, Heart Failure
Interventions
Data collection
Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
383 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
5
States / cities
Tucson, Arizona • Chicago, Illinois • New York, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 2, 2026 · Synced Sep 23, 2026, 6:19 AM EDT
Recruiting Not applicable Interventional

Parasternal Extravascular ICD System Pivotal Clinical Investigation (ALARION EV) Study

NCT07324031
View directory record Official record
Conditions
Ventricular Arrythmia, Ventricular Fibrillation, Ventricular Tachycardia
Interventions
Atala™ lead and EV-ICD Pulse Generator
Device
Lead sponsor
AtaCor Medical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
27
States / cities
Scottsdale, Arizona • Jonesboro, Arkansas • La Jolla, California + 23 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Sep 23, 2026, 6:19 AM EDT
Completed No phase listed Observational Results available

TYRX™ Envelope for Prevention of Infection Following Replacement With a CRT or ICD

NCT01043705
View directory record Official record
Conditions
Cardiac Implantable Electronic Device Infection
Interventions
Not listed
Lead sponsor
TYRX, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,262 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
52
States / cities
Birmingham, Alabama • Decatur, Alabama • Florence, Alabama + 44 more
Source: ClinicalTrials.gov public record
Updated Dec 23, 2015 · Synced Sep 23, 2026, 6:19 AM EDT
Completed No phase listed Observational Results available

SJ4 Post Approval Study in Implantable Cardioverter-Defibrillator and Cardiac Resynchronization Therapy Defibrillator Patients

NCT00940888
View directory record Official record
Conditions
Tachyarrhythmias, Sudden Cardiac Death, Heart Failure
Interventions
SJ4 connector and RV high voltage SJ4 lead
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
1,701 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 3, 2019 · Synced Sep 23, 2026, 6:19 AM EDT
Completed Not applicable Interventional Results available

Multicenter Automatic Defibrillator Implantation Trial - Chemotherapy-Induced Cardiomyopathy

NCT02164721
View directory record Official record
Conditions
Cardiomyopathy
Interventions
Three-lead CRT-D (Defibrillator)
Device
Lead sponsor
University of Rochester
Other
Eligibility
18 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
9
States / cities
Los Angeles, California • Washington D.C., District of Columbia • Tampa, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Mar 3, 2020 · Synced Sep 23, 2026, 6:19 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 23, 2026, 6:19 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Biomarkers in Aortic Stenosis - B.A.S.S.

NCT01334801
View directory record Official record
Conditions
Aortic Stenosis, Disorder of Prosthetic Cardiac Valve, Aortic Valve Insufficiency, Mitral Valve Insufficiency, Hypertrophic Cardiomyopathy, Tricuspid Valve Insufficiency
Interventions
Blood Draw
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
21 Years and older
Enrollment
378 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2020
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated May 4, 2022 · Synced Sep 23, 2026, 6:19 AM EDT
Completed Not applicable Interventional

Correlating QLV Interval to Left Ventricular (LV) Lead Position in Patients Receiving Cardiac Resynchronization Therapy.

NCT02166762
View directory record Official record
Conditions
Heart Failure, Cardiomyopathy, Cardiac Arrhythmia
Interventions
QLV interval measurement
Procedure
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jun 6, 2019 · Synced Sep 23, 2026, 6:19 AM EDT
Completed No phase listed Observational Results available

Medtronic Shock-Less Study on Physician Utilization of Shock Reduction Programming

NCT00856349
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Therapy Programming Report (TPR)
Behavioral
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
Not listed
Enrollment
4,384 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
83
States / cities
Anniston, Alabama • Phoenix, Arizona • Tucson, Arizona + 80 more
Source: ClinicalTrials.gov public record
Updated Jul 2, 2014 · Synced Sep 23, 2026, 6:19 AM EDT
Withdrawn Not applicable Interventional

Effect of Right Ventricular Lead Position on Defibrillation Threshold

NCT02844127
View directory record Official record
Conditions
Ventricular Tachycardia, Ventricular Fibrillation
Interventions
Implantable Cardioverter Defibrillator (ICD)
Procedure
Lead sponsor
OhioHealth
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 18, 2017 · Synced Sep 23, 2026, 6:19 AM EDT