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Showing 1–24 of 188 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Implantable Cardioverter-Defibrillators Clear all
Completed Phase 4 Interventional

The Use of Magnesium to Improve Blood Pressure, Cholesterol, and Glucose Control

NCT00282659
View directory record Official record
Conditions
Coronary Artery Disease, Hypertension, Dyslipidemia, Diabetes
Interventions
magnesium L-lactate
Drug
Lead sponsor
Hartford Hospital
Other
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated May 20, 2019 · Synced Sep 9, 2026, 7:24 AM EDT
Completed Not applicable Interventional

Clinical Investigation of the Medtronic Concerto™ Device

NCT00268320
View directory record Official record
Conditions
Congestive Heart Failure, Atrial Arrhythmia, Atrial Tachyarrhythmia, Atrial Fibrillation
Interventions
Cardiac Resynchronization Therapy+Implantable Cardioverter Defibrillator
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
270 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
30
States / cities
Anchorage, Alaska • Phoenix, Arizona • Santa Monica, California + 27 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2008 · Synced Sep 9, 2026, 7:24 AM EDT
Completed No phase listed Observational Results available

Educational Videos to Improve Patient Decision Making and Race Disparities in Implantable Cardioverter Defibrillator Use

NCT00918125
View directory record Official record
Conditions
Sudden Cardiac Arrest
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
19 Years and older
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
2
States / cities
Burlington, North Carolina • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 18, 2015 · Synced Sep 9, 2026, 7:24 AM EDT
Completed Not applicable Interventional Results available

Multicenter Automatic Defibrillator Implantation Trial With Subcutaneous Implantable Cardioverter Defibrillator

NCT02787785
View directory record Official record
Conditions
Tachycardia, Diabetes Mellitus, Cardiovascular Disease
Interventions
Subcutaneous Implantable Cardioverter Defibrillator
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
65 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
36
States / cities
Huntsville, Alabama • Scottsdale, Arizona • Jonesboro, Arkansas + 31 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2024 · Synced Sep 9, 2026, 7:24 AM EDT
Completed No phase listed Observational

Global Electrical Heterogeneity and Clinical Outcomes

NCT03210883
View directory record Official record
Conditions
Heart Failure, Implantable Defibrillator User, Ventricular Arrythmia
Interventions
Not listed
Lead sponsor
Larisa Tereshchenko
Other
Eligibility
18 Years to 89 Years
Enrollment
3,471 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
6
States / cities
Los Angeles, California • Stanford, California • Aurora, Colorado + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 7, 2021 · Synced Sep 9, 2026, 7:24 AM EDT
Completed No phase listed Observational

Study Evaluating the Use of MRI on CMS Patients

NCT02513056
View directory record Official record
Conditions
Pacemaker, Implantable Cardioverter Defibrillators
Interventions
MRI
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
872 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 13, 2024 · Synced Sep 9, 2026, 7:24 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 9, 2026, 7:24 AM EDT
Completed No phase listed Observational

Enhancing Knowledge Implantable Cardioverter-Defibrillators (ICDs)

NCT00822965
View directory record Official record
Conditions
Pacemaker, Implantable Cardioverter-Defibrillators
Interventions
Questionnaires, Phone Interviews, Educational Packet
Other · Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
104 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 6, 2016 · Synced Sep 9, 2026, 7:24 AM EDT
Withdrawn Phase 2 Interventional

Trial to Determine Imaging Parameters of LMI1195 in Heart Failure Patients at Low and High Risk of Defibrillator Firing

NCT01085175
View directory record Official record
Conditions
Heart Failure
Interventions
LMI 1195
Drug
Lead sponsor
Lantheus Medical Imaging
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 13, 2015 · Synced Sep 9, 2026, 7:24 AM EDT
Completed Not applicable Interventional

Prospective Randomized Evaluation of an Ultra Conservative Approach to Implantable Defibrillator (ICD) Programming in Patients With a Left Ventricular Assist Device (LVAD).

NCT01977703
View directory record Official record
Conditions
Heart Failure
Interventions
Ultra Conservative ICD Programming, Traditional ICD Programming
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 15, 2017 · Synced Sep 9, 2026, 7:24 AM EDT
Completed Phase 3 Interventional

Efficacy of Implantable Defibrillator Therapy After a Myocardial Infarction

NCT00673842
View directory record Official record
Conditions
Myocardial Infarction, Sudden Death
Interventions
Implantable Cardioverter Defibrillator + Usual Care, Usual care
Device · Other
Lead sponsor
University of Calgary
Other
Eligibility
18 Years to 80 Years
Enrollment
700 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2024
U.S. locations
29
States / cities
Huntsville, Alabama • Lakewood, Colorado • Tampa, Florida + 23 more
Source: ClinicalTrials.gov public record
Updated May 29, 2025 · Synced Sep 9, 2026, 7:24 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 9, 2026, 7:24 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 9, 2026, 7:24 AM EDT
Completed No phase listed Observational

Comparison of a MAGNET Protocol Versus "off-on" Protocol for Patients With Implantable Cardioverter Defibrillators

NCT01599065
View directory record Official record
Conditions
Sudden Cardiac Death, Arrhythmia, Heart Failure
Interventions
Magnet or Off-On
Other
Lead sponsor
Midwest Heart Foundation
Other
Eligibility
19 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
3
States / cities
Downers Grove, Illinois • Elmhurst, Illinois • Naperville, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 20, 2013 · Synced Sep 9, 2026, 7:24 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 Sep 2, 2026 · Synced Sep 9, 2026, 7:24 AM 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 19, 2026 · Synced Sep 9, 2026, 7:24 AM EDT
Completed Phase 3 Interventional

Efficacy and Safety Evaluation of Azimilide Dihydrochloride in Patients With Implantable Cardioverter Defibrillators

NCT00035490
View directory record Official record
Conditions
Arrhythmia
Interventions
Azimilide Dihydrochloride, placebo
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years and older
Enrollment
633 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2004
U.S. locations
78
States / cities
Mobile, Alabama • Mesa, Arizona • Little Rock, Arkansas + 67 more
Source: ClinicalTrials.gov public record
Updated Oct 2, 2011 · Synced Sep 9, 2026, 7:24 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 9, 2026, 7:24 AM EDT
Completed Not applicable Interventional Results available

Randomized Study of the Use of Warfarin During Pacemaker or ICD Implantation in Patients Requiring Long Term Anticoagulation

NCT00721136
View directory record Official record
Conditions
Bradycardia, Tachycardia, Atrial Fibrillation, Valvular Heart Disease
Interventions
continue warfarin through the procedure, Hold warfarin, Warfarin held with heparin transition.
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 99 Years
Enrollment
104 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
2
States / cities
Baltimore, Maryland • Columbia, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 30, 2017 · Synced Sep 9, 2026, 7:24 AM EDT
Not listed Not applicable Interventional

Cardiac Magnetic Resonance Imaging After Cardiac Resynchronization Therapy

NCT03183011
View directory record Official record
Conditions
Heart Failure, Systolic
Interventions
MRI
Other
Lead sponsor
Kenneth Bilchick, MD
Other
Eligibility
25 Years to 85 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 11, 2017 · Synced Sep 9, 2026, 7:24 AM EDT
Not listed Phase 4 Interventional

Magnesium to Reduce Implantable Cardioverter Defibrillator (ICD) Shocks and Improve Patient's Quality of Life.

NCT00282620
View directory record Official record
Conditions
Arrhythmia, Quality of Life, Hypomagnesemia
Interventions
Magnesium L-lactate
Drug
Lead sponsor
Hartford Hospital
Other
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated Nov 19, 2007 · Synced Sep 9, 2026, 7:24 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 9, 2026, 7:24 AM 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 18, 2018 · Synced Sep 9, 2026, 7:24 AM EDT
Completed Not applicable Interventional

Interventional Study of Anxiety Symptoms in the Implantable Cardioverter Defibrillator (ICD) Patient

NCT00851071
View directory record Official record
Conditions
Anxiety
Interventions
Cognitive Behavioral Therapy
Behavioral
Lead sponsor
The Cleveland Clinic
Other
Eligibility
Not listed
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2017
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 21, 2017 · Synced Sep 9, 2026, 7:24 AM EDT