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Showing 1–24 of 193 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Implantable Cardioverter Defibrillator Clear all
Completed Not applicable Interventional

Improvement in Clinical Outcomes in Heart Failure Patients With ICDs That Practice Meditation

NCT00611260
View directory record Official record
Conditions
Congestive Heart Failure, Cardiac Resynchronization Therapy
Interventions
Vipassana Meditation practice and instruction, Standard Medical Care
Behavioral · Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 85 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Jul 22, 2026, 2:24 PM EDT
Completed No phase listed Observational

Implantable Cardioverter Defibrillator (ICD) Function During Ventricular Assist Device (VAD) Implantation

NCT01576562
View directory record Official record
Conditions
Heart Failure
Interventions
Not listed
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 7, 2017 · Synced Jul 22, 2026, 2:24 PM 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 Jul 22, 2026, 2:24 PM EDT
Completed No phase listed Observational

Study of the Implantable Cardioverter Defibrillator (ICD) Intracardiac Electrograms

NCT00916435
View directory record Official record
Conditions
Congestive Heart Failure, Sudden Cardiac Death, Arrhythmia, Cardiomyopathies
Interventions
Not listed
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
630 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
2
States / cities
Baltimore, Maryland • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 20, 2015 · Synced Jul 22, 2026, 2:24 PM EDT
Recruiting No phase listed Observational

Prospective Observational Study of the ICD in Sudden Cardiac Death Prevention

NCT00733590
View directory record Official record
Conditions
Heart Failure, Congestive, Death, Sudden, Cardiac, Arrhythmia, Cardiomyopathies
Interventions
Not listed
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 85 Years
Enrollment
1,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2029
U.S. locations
4
States / cities
Washington D.C., District of Columbia • Baltimore, Maryland • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jan 19, 2026 · Synced Jul 22, 2026, 2:24 PM EDT
Active, not recruiting Phase 1Phase 2 Interventional

Effects of Triiodothyronine (T3) in Ischemic Heart Failure

NCT05384847
View directory record Official record
Conditions
Heart Failure
Interventions
Thyroid hormone T3, Control Group
Drug · Other
Lead sponsor
Emory University
Other
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 25, 2025 · Synced Jul 22, 2026, 2:24 PM EDT
Completed No phase listed Observational

Analysis of Both Sex and Device Specific Factors on Outcomes in Patients with Non-Ischemic Cardiomyopathy

NCT03884608
View directory record Official record
Conditions
Cardiomyopathies, Gender, Implantable Defibrillator User
Interventions
Not listed
Lead sponsor
Biotronik, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
49
States / cities
Birmingham, Alabama • Fairhope, Alabama • Rancho Mirage, California + 41 more
Source: ClinicalTrials.gov public record
Updated Nov 21, 2024 · Synced Jul 22, 2026, 2:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Comparing Rate Response With CLS Versus Accelerometer ICD Settings in Heart Failure Patients With BIOTRONIK CRT-Ds

NCT02693262
View directory record Official record
Conditions
Heart Failure, ICD, Chronotropic Incompetence
Interventions
CLS Mode on Biotronik CRT-D, Accelerometer Mode on Biotronik CRT-D
Device
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 99 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Aug 4, 2021 · Synced Jul 22, 2026, 2:24 PM EDT
Completed Phase 3 Interventional Results available

Implantable Cardioverter-Defibrillator Use in the VA System

NCT01217827
View directory record Official record
Conditions
Cardiomyopathies
Interventions
Clinical Reminder
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
2
States / cities
Palo Alto, California • Stanford, California
Source: ClinicalTrials.gov public record
Updated May 18, 2021 · Synced Jul 22, 2026, 2:24 PM EDT
Completed Not applicable Interventional Results available

SJM MRI Diagnostic Imaging Registry (IDE)

NCT02807948
View directory record Official record
Conditions
Cardiac Arrhythmia
Interventions
Pacemaker, ICD, or CRT device
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
189 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
58
States / cities
Scottsdale, Arizona • Tucson, Arizona • Jonesboro, Arkansas + 55 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2019 · Synced Jul 22, 2026, 2:24 PM EDT
Completed No phase listed Observational

First Arrhythmia Collection of Transvenous and Simultaneous Subcutaneous Implantable Defibrillator Data

NCT01161589
View directory record Official record
Conditions
Ventricular Tachycardia, Ventricular Fibrillation, Atrial Fibrillation
Interventions
Not listed
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
142 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
3
States / cities
Chicago, Illinois • Charleston, South Carolina • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Feb 15, 2017 · Synced Jul 22, 2026, 2:24 PM EDT
Completed Phase 2 Interventional

Exercise After an ICD

NCT00522340
View directory record Official record
Conditions
Defibrillators, Implantable, Heart Failure, Congestive
Interventions
Aerobic Exercise Program
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
21 Years and older
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2014
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Nov 9, 2014 · Synced Jul 22, 2026, 2:24 PM EDT
Terminated Not applicable Interventional Results available

Pilot Study of Catheter Ablation for Ventricular Tachycardia in Patients With an Implantable Cardioverter Defibrillator

NCT01576042
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
amiodarone, sotalol, Biosense Webster's NAVI-STAR Thermo-Cool
Drug · Device
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
5
States / cities
Baltimore, Maryland • Durham, North Carolina • Columbus, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 15, 2014 · Synced Jul 22, 2026, 2:24 PM EDT
Completed Not applicable Interventional

Same Day Discharge (SDD) After Implantable Cardioverter Defibrillator (ICD) Implant

NCT01993862
View directory record Official record
Conditions
Heart Failure, Coronary Artery Disease
Interventions
Same Day Discharge
Other
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
266 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
28
States / cities
Huntsville, Alabama • Mobile, Alabama • Phoenix, Arizona + 23 more
Source: ClinicalTrials.gov public record
Updated Feb 3, 2019 · Synced Jul 22, 2026, 2:24 PM EDT
Completed No phase listed Observational

Genetic Substudy of the Alternans Before Cardioverter Defibrillator (ABCD) Trial

NCT00583297
View directory record Official record
Conditions
Ventricular Tachycardia, Cardiovascular Diseases, Arrythmia, CVD
Interventions
Not listed
Lead sponsor
CardioDx
Industry
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 21, 2018 · Synced Jul 22, 2026, 2:24 PM EDT
Completed No phase listed Observational Results available

Extracellular Matrix Marker of Arrhythmia Risk (EMMA)

NCT00376532
View directory record Official record
Conditions
Myocardiopathies, Ischemia, Myocardial, Arrythmia, Death, Sudden, Cardiac
Interventions
Not listed
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 3, 2014 · Synced Jul 22, 2026, 2:24 PM EDT
Not listed Phase 4 Interventional

Study of Defibrillation Testing In Patients Undergoing Initial ICD Implantation

NCT01905007
View directory record Official record
Conditions
Ventricular Arrhythmias
Interventions
Defibrillation testing
Device
Lead sponsor
The Cooper Health System
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
2
States / cities
Camden, New Jersey • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 21, 2013 · Synced Jul 22, 2026, 2:24 PM EDT
Withdrawn Not applicable Interventional

Clonidine to Prevent Implantable Cardiovertor Defibrillator Firing

NCT00585871
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
clonidine, metoprolol
Drug
Lead sponsor
James Martins
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 23, 2018 · Synced Jul 22, 2026, 2:24 PM 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 Jul 22, 2026, 2:24 PM EDT
Terminated Not applicable Interventional Results available

ST Monitoring to Detect Acute Coronary Syndrome Events in Implantable Cardioverter Defibrillator Patients

NCT01424722
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Fortify® ST, Fortify Assura® ST, Ellipse® ST family of devices
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
2,258 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
97
States / cities
Birmingham, Alabama • Huntsville, Alabama • Mesa, Arizona + 85 more
Source: ClinicalTrials.gov public record
Updated Jan 27, 2021 · Synced Jul 22, 2026, 2:24 PM EDT
Terminated Phase 3 Interventional Results available

Catheter Ablation Versus Amiodarone for Shock Prophylaxis in Defibrillator Patients With Ventricular Tachycardia

NCT01097330
View directory record Official record
Conditions
Defibrillators, Implantable, Tachycardia, Ventricular
Interventions
Ablation, Amiodarone
Procedure · Drug
Lead sponsor
Population Health Research Institute
Other
Eligibility
19 Years to 84 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
5
States / cities
Chicago, Illinois • Rochester, Minnesota • Philadelphia, Pennsylvania + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 28, 2020 · Synced Jul 22, 2026, 2:24 PM EDT
Completed Not applicable Interventional

Positive Therapy for Autonomic Function & Mood in ICD Patients

NCT02088619
View directory record Official record
Conditions
Ventricular Arrhythmia, Implantable Cardioverter Defibrillator
Interventions
Quality of Life Therapy (QOLT), Heart Healthy Education (HHE)
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 1, 2017 · Synced Jul 22, 2026, 2:24 PM 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 Jul 22, 2026, 2:24 PM EDT
Completed No phase listed Observational Results available

Registry of Patients for MRI With Non-MRI Conditional Pacemakers and ICD Non-MRI Conditional Pacemakers and ICD

NCT02318550
View directory record Official record
Conditions
MRI Scans, Magnetic Resonance Imaging, Pacemaker, Implantable Cardioverter Defibrillator
Interventions
MRI Scan
Other
Lead sponsor
Lancaster General Hospital
Other
Eligibility
18 Years and older
Enrollment
262 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Lancaster, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 30, 2021 · Synced Jul 22, 2026, 2:24 PM EDT