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

Technology Dependency and Health-Related Quality of Life

NCT00022984
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
Not listed
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jun 10, 2026, 12:41 PM EDT
Completed Phase 2 Interventional

Double Blind Placebo Controlled Dose Ranging Study of the Efficacy and Safety of SSR149744c 100 or 300 mg for the Prevention of ventrICular ARrhythmia-triggered Icd interventiOnS

NCT00232297
View directory record Official record
Conditions
Arrhythmia, Tachycardia, Ventricular, Ventricular Fibrillation
Interventions
SSR149744C
Drug
Lead sponsor
Sanofi
Industry
Eligibility
21 Years and older
Enrollment
153 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Bridgewater, New Jersey
Source: ClinicalTrials.gov public record
Updated May 7, 2012 · Synced Jun 10, 2026, 12:41 PM EDT
Completed Phase 2 Interventional

Dose Ranging Study of Celivarone With Amiodarone as Calibrator for the Prevention of Implantable Cardioverter Defibrillator (ICD) Interventions or Death

NCT00993382
View directory record Official record
Conditions
Arrhythmia Prophylaxis, Ventricular Arrhythmia
Interventions
Celivarone, Amiodarone, Matching placebo
Drug
Lead sponsor
Sanofi
Industry
Eligibility
21 Years and older
Enrollment
486 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
37
States / cities
Huntsville, Alabama • Mobile, Alabama • Mesa, Arizona + 33 more
Source: ClinicalTrials.gov public record
Updated May 29, 2016 · Synced Jun 10, 2026, 12:41 PM 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 Jun 10, 2026, 12:41 PM EDT
Active, not recruiting No phase listed Observational

PRE-DETERMINE Cohort Study

NCT01114269
View directory record Official record
Conditions
Coronary Artery Disease, Left Ventricular Dysfunction, Sudden Cardiac Death
Interventions
Not listed
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
5,764 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2026
U.S. locations
86
States / cities
Anchorage, Alaska • Glendale, Arizona • Phoenix, Arizona + 76 more
Source: ClinicalTrials.gov public record
Updated Oct 6, 2025 · Synced Jun 10, 2026, 12:41 PM EDT
Completed No phase listed Observational

Effects of Monopolar Electrocautery Use During Surgery on Implanted Cardiac Defibrillators

NCT01572246
View directory record Official record
Conditions
Heart Failure, Tachycardia, Ventricular
Interventions
Optimal placement of return pad
Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years and older
Enrollment
167 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Feb 23, 2017 · Synced Jun 10, 2026, 12:41 PM EDT
Completed No phase listed Observational

Patient and Physician Survey Determinants of Appropriate ICD Utilization

NCT01514773
View directory record Official record
Conditions
Heart Failure, Systolic
Interventions
Not listed
Lead sponsor
Todd M Koelling, MD
Other
Eligibility
18 Years and older
Enrollment
452 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 16, 2017 · Synced Jun 10, 2026, 12:41 PM EDT
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 Jun 10, 2026, 12:41 PM EDT
Completed Not applicable Interventional

MASTER I - Microvolt T Wave Alternans Testing for Risk Stratification of Post MI Patients

NCT00305240
View directory record Official record
Conditions
Myocardial Infarction, Arrhythmia, Ventricular, Ischemic Cardiomyopathy
Interventions
T Wave Alternans Test
Procedure
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
Not listed
Enrollment
656 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
47
States / cities
Mobile, Alabama • Phoenix, Arizona • Walnut Creek, California + 44 more
Source: ClinicalTrials.gov public record
Updated Feb 12, 2008 · Synced Jun 10, 2026, 12:41 PM EDT
Terminated Phase 3 Interventional Results available

Mental Stress Reduction in Defibrillator Patients

NCT00624520
View directory record Official record
Conditions
Cardiomyopathy, Dilated, Arrhythmia, Anger, Stress
Interventions
Cognitive Behavioral Stress Management (CBSM), Patient Education
Behavioral · Other
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
21 Years to 85 Years
Enrollment
129 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 21, 2014 · Synced Jun 10, 2026, 12:41 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 Jun 10, 2026, 12:41 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Transvenous Lead Removal Post-Market Clinical Study

NCT03688412
View directory record Official record
Conditions
Cardiac Electrophysiology
Interventions
Cook lead extraction devices
Device
Lead sponsor
Cook Research Incorporated
Industry
Eligibility
18 Years and older
Enrollment
230 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
6
States / cities
San Francisco, California • Urbana, Illinois • Raleigh, North Carolina + 3 more
Source: ClinicalTrials.gov public record
Updated May 27, 2020 · Synced Jun 10, 2026, 12:41 PM EDT
Terminated No phase listed Observational

Study of Paced QRS Duration as a Marker of Sudden Cardiac Death

NCT01948206
View directory record Official record
Conditions
Sudden Cardiac Death
Interventions
Not listed
Lead sponsor
Pocono Medical Center
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
East Stroudsburg, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 12, 2016 · Synced Jun 10, 2026, 12:41 PM EDT
Enrolling by invitation No phase listed Observational

TRAjectories and CLinical ExpeRiences of ICD Therapy Study

NCT05116176
View directory record Official record
Conditions
Implantable Defibrillator User
Interventions
Implantable cardioverter-defibrillators
Device
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
65 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Jun 10, 2026, 12:41 PM EDT
Completed No phase listed Observational

Safety of Magnetic Resonance Imaging in Patients With Pacemakers and Defibrillators

NCT02227004
View directory record Official record
Conditions
Conditions Requiring Diagnostic Evaluation
Interventions
Perform MRI in patients with pacemaker or ICD
Diagnostic Test
Lead sponsor
Johns Hopkins University
Other
Eligibility
9 Years to 100 Years
Enrollment
1,275 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 19, 2021 · Synced Jun 10, 2026, 12:41 PM EDT
Recruiting No phase listed Observational

Ambulatory Surgical Center Implantable Cardioverter-Defibrillator Outcomes Registry

NCT03604133
View directory record Official record
Conditions
Arrhythmia
Interventions
Not listed
Lead sponsor
QuesGen Systems Inc
Other
Eligibility
Not listed
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
1
States / cities
Lehi, Utah
Source: ClinicalTrials.gov public record
Updated Jan 21, 2021 · Synced Jun 10, 2026, 12:41 PM EDT
Completed No phase listed Observational

Sensing Atrial High Rate Episodes With Implantable Cardioverter-Defibrillators Trial (The SENSE Trial)

NCT02186704
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
ICD with DX system
Device
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
450 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
8
States / cities
Birmingham, Alabama • Boston, Massachusetts • New York, New York + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2018 · Synced Jun 10, 2026, 12:41 PM EDT
Completed Not applicable Interventional Results available

A Clinical Evaluation of the Durata or Optisure High Voltage Leads and Ellipse VR ICD Undergoing MRI, an IDE Study

NCT02787291
View directory record Official record
Conditions
Implantable Defibrillator User
Interventions
Ellipse VR ICD and Durata/Optisure lead
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
227 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
26
States / cities
Phoenix, Arizona • Bakersfield, California • La Jolla, California + 22 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2020 · Synced Jun 10, 2026, 12:41 PM 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 Mar 4, 2026 · Synced Jun 10, 2026, 12:41 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 Jun 10, 2026, 12:41 PM EDT
Completed Not applicable Interventional

MASTER II - Microvolt T Wave Alternans Testing for Risk Stratification of Post MI Patients

NCT00305214
View directory record Official record
Conditions
Myocardial Infarction, Arrhythmia, Ventricular, Ischemic Cardiomyopathy
Interventions
T Wave Alternans Test
Procedure
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
Not listed
Enrollment
405 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
47
States / cities
Mobile, Alabama • Phoenix, Arizona • Walnut Creek, California + 44 more
Source: ClinicalTrials.gov public record
Updated Feb 12, 2008 · Synced Jun 10, 2026, 12:41 PM EDT
Recruiting Not applicable Interventional

Effectiveness of Exercise After an ICD

NCT03544489
View directory record Official record
Conditions
Heart Arrest, Implantable Defibrillator User, Physical Activity
Interventions
E-ICD Intervention
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Jun 10, 2026, 12:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Advancing Understanding of Transportation Options

NCT04141891
View directory record Official record
Conditions
Diabetic Retinopathy, Macular Degeneration, Glaucoma, Retinitis Pigmentosa, Vision Disorders, Acute Coronary Syndrome, Implantable Defibrillator User, Congestive Heart Failure, Hypertrophic Obstructive Cardiomyopathy, Orthostatic Hypotension, Syncope, Presyncope, Narcolepsy, Dementia, Multiple Sclerosis, Parkinson Disease, Brain Injuries, Spinal Cord Injuries, Stroke, Vertigo, Dizziness, Seizures, Substance Use, Insulin Dependent Diabetes Mellitus, Arthritis, Foot--Abnormalities, Chronic Obstructive Pulmonary Disease, Obstructive Sleep Apnea, End Stage Renal Disease, Sleep Apnea, Insomnia, Restless Legs Syndrome
Interventions
Driving Decision Aid, Older Drivers Website
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
529 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
3
States / cities
La Jolla, California • Aurora, Colorado • Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Jun 10, 2026, 12:41 PM EDT
Completed Not applicable Interventional Results available

Multicenter Automatic Defibrillator Implantation Trial - Reduce Inappropriate Therapy

NCT00947310
View directory record Official record
Conditions
Primary Prevention of Sudden Cardiac Arrest
Interventions
Standard ICD programming, High rate cutoff, Long delay
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
21 Years and older
Enrollment
1,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Aug 7, 2018 · Synced Jun 10, 2026, 12:41 PM EDT