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ClinicalTrials.gov public records Last synced Jun 10, 2026, 11:14 AM EDT

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Showing 1–24 of 204 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Implantable Defibrillator Clear all
Completed No phase listed Observational

Risk Stratification After Acute Myocardial Infarction With Cardiac MRI

NCT03725826
View directory record Official record
Conditions
Acute Myocardial Infarction (AMI)
Interventions
Not listed
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 30, 2018 · Synced Jun 10, 2026, 11:14 AM EDT
Recruiting No phase listed Observational

Implantable Cardioverter Defibrillator (ICD Registry)

NCT01999140
View directory record Official record
Conditions
Heart Failure, Nonischemic Cardiomyopathy, Ischemic Cardiomyopathy, Ventricular Arrhythmia, Complications; Device, Cardiac
Interventions
Not listed
Lead sponsor
American College of Cardiology
Other
Eligibility
Not listed
Enrollment
1,750 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2030
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Apr 17, 2024 · Synced Jun 10, 2026, 11:14 AM EDT
Terminated No phase listed Observational Results available

Arrythmia Burden in Cardiac Contractility Modulation (CCM)

NCT05704426
View directory record Official record
Conditions
Atrial Fibrillation, Arrythmia
Interventions
Impulse Dynamics Optimizer Device
Device
Lead sponsor
Hackensack Meridian Health
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Hackensack, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 18, 2024 · Synced Jun 10, 2026, 11:14 AM EDT
Recruiting No phase listed Observational

Left Ventricular Structural Predictors of Sudden Cardiac Death

NCT01076660
View directory record Official record
Conditions
Ischemic Cardiomyopathy, Nonischemic Cardiomyopathy
Interventions
Not listed
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years to 80 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2030
U.S. locations
2
States / cities
Newark, Delaware • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 19, 2026 · Synced Jun 10, 2026, 11:14 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 Jun 10, 2026, 11:14 AM EDT
Recruiting Not applicable Interventional

Self-Management Interventions After an ICD Shock

NCT06037785
View directory record Official record
Conditions
Implantable Defibrillator User, Stress Reaction, Ptsd, Stress Management, Social Cognitive Theory
Interventions
Self-Paced Self-Management (SPSM)
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 23, 2025 · Synced Jun 10, 2026, 11:14 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 Jun 10, 2026, 11:14 AM EDT
Completed Phase 4 Interventional

Reduce Ventricular Pacing in Dual Chamber Implantable Cardioverter Defibrillators Using AutoIntrinsic Conduction Search Study

NCT00187239
View directory record Official record
Conditions
Arrhythmia
Interventions
Autointrinsic Conduction Search Algorithm
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
157 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Pomona, New Jersey
Source: ClinicalTrials.gov public record
Updated Feb 3, 2019 · Synced Jun 10, 2026, 11:14 AM EDT
Terminated No phase listed Observational Results available

Protego DF4 Post Approval Registry

NCT02243696
View directory record Official record
Conditions
Implantable Defibrillator User
Interventions
Not listed
Lead sponsor
Biotronik, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,694 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
68
States / cities
Gadsden, Alabama • Avondale, Arizona • Glendale, Arizona + 65 more
Source: ClinicalTrials.gov public record
Updated Jun 21, 2020 · Synced Jun 10, 2026, 11:14 AM EDT
Terminated No phase listed Observational Results available

ST Segment Detection Study

NCT00930969
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
ICD
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
175 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
17
States / cities
Anchorage, Alaska • Brandon, Florida • Orlando, Florida + 14 more
Source: ClinicalTrials.gov public record
Updated Feb 17, 2019 · Synced Jun 10, 2026, 11:14 AM EDT
Completed Not applicable Interventional

A Study of Symptoms and Quality of Life in Patients With Implantable Cardiac Defibrillators (ICDs) and Their Caregivers

NCT01454817
View directory record Official record
Conditions
Quality of Life, Implantable Cardiac Defibrillators, ICDs
Interventions
Quality of life
Behavioral
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
562 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
6
States / cities
Denver, Colorado • New Haven, Connecticut • Rochester, Minnesota + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2016 · Synced Jun 10, 2026, 11:14 AM 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 Jun 10, 2026, 11:14 AM EDT
Completed No phase listed Observational Results available

PARTNERS HF: Program to Access and Review Trending Information and Evaluate Correlation to Symptoms in Patients With Heart Failure

NCT00279955
View directory record Official record
Conditions
Heart Failure, Congestive
Interventions
Cardiac Resynchronization Therapy Device
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
1,024 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
93
States / cities
Huntsville, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 90 more
Source: ClinicalTrials.gov public record
Updated Jun 14, 2012 · Synced Jun 10, 2026, 11:14 AM EDT
Completed Not applicable Interventional

A Randomised Trial of S-ICD Implantation With and Without Defibrillation Testing

NCT03495297
View directory record Official record
Conditions
Ventricular Arrythmia
Interventions
ommitence of defibrillation testing
Procedure
Lead sponsor
Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
Other
Eligibility
18 Years and older
Enrollment
965 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
7
States / cities
Orlando, Florida • Atlanta, Georgia • Chicago, Illinois + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Jun 10, 2026, 11:14 AM EDT
Completed Not applicable Interventional

Establishing a Standard for Peri-operative Implantable Cardioverter Defibrillator (ICD) Patient Education

NCT00845234
View directory record Official record
Conditions
Arrhythmia
Interventions
Intervention
Behavioral
Lead sponsor
East Carolina University
Other
Eligibility
18 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
3
States / cities
Aurora, Colorado • Lone Tree, Colorado • Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 25, 2013 · Synced Jun 10, 2026, 11:14 AM 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 Jun 10, 2026, 11:14 AM EDT
Completed Phase 3 Interventional

Ovatio DR and VR Implantable Cardioverter Defibrillators Post-approval Study

NCT00586378
View directory record Official record
Conditions
Sudden Cardiac Death
Interventions
Ovatio DR and Ovatio VR
Device
Lead sponsor
ELA Medical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Mesa, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 1, 2012 · Synced Jun 10, 2026, 11:14 AM EDT
Completed Phase 4 Interventional Results available

Antiarrhythmic Effects of Spironolactone in Patients With ICDs

NCT04495712
View directory record Official record
Conditions
Ventricular Arrhythmias
Interventions
spironolactone, placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Oct 8, 2020 · Synced Jun 10, 2026, 11:14 AM EDT
Completed Not applicable Interventional Results available

Comparison of VF Induction Techniques During Medtronic ICD Implant (VF) (ICD)

NCT02027883
View directory record Official record
Conditions
Cardiomyopathy
Interventions
Nominal T shock setting, Educated T shock setting
Device
Lead sponsor
James Merrill
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Kingsport, Tennessee
Source: ClinicalTrials.gov public record
Updated May 21, 2018 · Synced Jun 10, 2026, 11:14 AM EDT
Completed Phase 2 Interventional Results available

Evaluating Ventricular Arrhythmia in Subjects With Implantable Cardioverter Defibrillator or Cardiac Resynchronization Therapy-Defibrillator

NCT02104583
View directory record Official record
Conditions
Ventricular Arrhythmia
Interventions
Eleclazine, Placebo to match eleclazine
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years to 80 Years
Enrollment
313 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
37
States / cities
Mesa, Arizona • Long Beach, California • Los Angeles, California + 32 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2019 · Synced Jun 10, 2026, 11:14 AM EDT
Terminated Phase 3 Interventional

Efficacy and Safety Study of Azimilide on the Incidence of Cardiovascular Hospitalizations/Emergency Department Visits or Cardiovascular Death in Patients With an Implantable Cardioverter Defibrillator (ICD) (SHIELD-2)

NCT01464476
View directory record Official record
Conditions
Arrhythmias, Cardiac, Heart Diseases, Cardiovascular Diseases, Implantable Cardioverter Defibrillator
Interventions
Azimilide Dihydrochloride, Placebo
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
83
States / cities
Birmingham, Alabama • Huntsville, Alabama • Phoenix, Arizona + 72 more
Source: ClinicalTrials.gov public record
Updated May 5, 2013 · Synced Jun 10, 2026, 11:14 AM EDT
Completed Phase 3 Interventional Results available

Ranolazine Implantable Cardioverter-Defibrillator Trial

NCT01215253
View directory record Official record
Conditions
Ischemic Cardiomyopathy, Nonischemic Cardiomyopathy, Heart Failure
Interventions
Ranolazine
Drug
Lead sponsor
University of Rochester
Other
Eligibility
21 Years and older
Enrollment
1,012 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
83
States / cities
Tucson, Arizona • Little Rock, Arkansas • East Palo Alto, California + 70 more
Source: ClinicalTrials.gov public record
Updated Aug 26, 2018 · Synced Jun 10, 2026, 11:14 AM EDT
Completed No phase listed Observational

3T MRI CIED Post-Approval Study

NCT02969395
View directory record Official record
Conditions
Cardiac Rhythm Disorder
Interventions
Not listed
Lead sponsor
Medtronic
Industry
Eligibility
Not listed
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
118
States / cities
Birmingham, Alabama • Anchorage, Alaska • Chandler, Arizona + 115 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2022 · Synced Jun 10, 2026, 11:14 AM EDT
Enrolling by invitation Not applicable Interventional

Magnetic Resonance Imaging (MRI) in Patients With Pacemakers and Implanted Cardioverter Defibrillators

NCT02888353
View directory record Official record
Conditions
Device:MRI
Interventions
Device: MRI
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
9 Years to 100 Years
Enrollment
4,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 14, 2025 · Synced Jun 10, 2026, 11:14 AM EDT