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Showing 1–24 of 128 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Death, Sudden, Cardiac Clear all
Completed Not applicable Interventional Results available

ASSURE WCD Clinical Evaluation - Conversion Efficacy Study

NCT04132466
View directory record Official record
Conditions
Death, Sudden, Cardiac
Interventions
Defibrillation using the ASSURE wearable cardioverter defibrillator therapy delivered via a waveform delivery test system
Device
Lead sponsor
Kestra Medical Technologies, Inc.
Industry
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
4
States / cities
Anchorage, Alaska • Ann Arbor, Michigan • St Louis, Missouri + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 4, 2024 · Synced Jul 20, 2026, 6:58 PM EDT
Terminated No phase listed Observational

LifeVest Post-CABG Registry

NCT01448005
View directory record Official record
Conditions
Sudden Cardiac Death, Ventricular Fibrillation, Ventricular Tachycardia, Ventricular Dysfunction, Myocardial Ischemia
Interventions
wearable defibrillator (LifeVest)
Device
Lead sponsor
Zoll Medical Corporation
Industry
Eligibility
18 Years and older
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
5
States / cities
Sacramento, California • Atlanta, Georgia • Takoma Park, Maryland + 2 more
Source: ClinicalTrials.gov public record
Updated Dec 5, 2017 · Synced Jul 20, 2026, 6:58 PM EDT
Completed Phase 3 Interventional Results available

Effect of High Dose Fish Oil Supplementation After Recent Heart Attack Using Magnetic Resonance Imaging

NCT00729430
View directory record Official record
Conditions
Myocardial Infarction, Death, Sudden, Cardiac
Interventions
Omega-3 Fatty Acids (Fish Oil Supplements), Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
21 Years and older
Enrollment
358 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 31, 2017 · Synced Jul 20, 2026, 6:58 PM EDT
Completed No phase listed Observational

Changes in Heart Rhythms Associated With Antipsychotic Drug Treatment

NCT00538122
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Bipolar Disorder
Interventions
24 Holter Monitor Recording
Device
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 26, 2009 · Synced Jul 20, 2026, 6:58 PM EDT
Completed No phase listed Observational

Cardiac Rhythm Abnormalities in Patients With Refractory Epilepsy at High Risk for Sudden Death

NCT00203333
View directory record Official record
Conditions
Refractory Epilepsy, Arrhythmia, Sudden Death
Interventions
Medtronic REVEAL
Device
Lead sponsor
Thomas Jefferson University
Other
Eligibility
16 Years to 49 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2010
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 17, 2016 · Synced Jul 20, 2026, 6:58 PM EDT
Active, not recruiting No phase listed Observational

Longitudinal Evaluation of Active-Duty Personnel with Accessory Pathways (LEAD-AP)

NCT06798961
View directory record Official record
Conditions
Cardiac Death, Cardiac Death, Sudden, Wolf Parkinson White Syndrome
Interventions
Ablation, Standard of care without ablation
Procedure
Lead sponsor
United States Naval Medical Center, San Diego
Federal
Eligibility
18 Years to 40 Years
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Mar 13, 2025 · Synced Jul 20, 2026, 6:58 PM EDT
Recruiting Not applicable Interventional

Developing a Digital Aid to Improve ICD Decisions

NCT07084142
View directory record Official record
Conditions
Heart Failure and Reduced Ejection Fraction
Interventions
Online, patient-facing decision-making aid (app) with personalized risk information., Implantable Cardioverter Defibrillator (ICD), Online, patient-facing decision-making app without personalized risk information.
Other · Device
Lead sponsor
Stanford University
Other
Eligibility
60 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
2
States / cities
San Francisco, California • Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Jul 20, 2026, 6:58 PM EDT
Recruiting No phase listed Observational

HS Students Mandatory Universal Student Instruction in CPR Appraised Learning- Is the Mandate Working?

NCT04493970
View directory record Official record
Conditions
Sudden Cardiac Arrest
Interventions
High School Students Survey
Other
Lead sponsor
Kansas City Heart Rhythm Research Foundation
Other
Eligibility
12 Years to 25 Years
Enrollment
5,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Oct 25, 2024 · Synced Jul 20, 2026, 6:58 PM EDT
Recruiting No phase listed Observational

Imaging Techniques for Identifying Factors of Sudden Cardiac Death Risk

NCT00181233
View directory record Official record
Conditions
Sudden Cardiac Death
Interventions
Not listed
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Jul 20, 2026, 6:58 PM 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 Jul 20, 2026, 6:58 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Influence of Progesterone Administration on Drug-Induced QT Interval Lengthening

NCT01929083
View directory record Official record
Conditions
Prolonged QT Interval in EKG and Sudden Death
Interventions
Progesterone, Placebo, Ibutilide
Drug
Lead sponsor
Indiana University
Other
Eligibility
21 Years to 40 Years · Female only
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
2
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 29, 2015 · Synced Jul 20, 2026, 6:58 PM EDT
Completed Phase 1 Interventional Results available

Study to Evaluate the Effect of Eleclazine on QT, Safety, and Tolerability in Participants With Long QT2 Syndrome

NCT02365506
View directory record Official record
Conditions
LQT2 Syndrome
Interventions
Eleclazine, Placebo
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years to 65 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Dec 29, 2020 · Synced Jul 20, 2026, 6:58 PM EDT
Completed Not applicable Interventional Results available

Hemodynamic Effects of Standard Cardiopulmonary Resuscitation (CPR), Active Compression Decompression CPR With an Inspiratory Impedance Device, and Standard CPR With an Intrathoracic Pressure Regulator During Out-of-hospital Cardiac Arrest

NCT01325870
View directory record Official record
Conditions
Cardiac Arrest, Sudden Cardiac Death
Interventions
ACD-CPR, ITPR, S-CPR, Impedance Threshold Device (ITD)
Device · Procedure
Lead sponsor
Advanced Circulatory Systems
Industry
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Kalamazoo, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 11, 2016 · Synced Jul 20, 2026, 6:58 PM EDT
Completed Not applicable Interventional Results available

The Jewel IDE Study

NCT05201495
View directory record Official record
Conditions
Sudden Cardiac Arrest
Interventions
Jewel Patch Wearable Cardioverter Defibrillator (P-WCD)
Device
Lead sponsor
Element Science, Inc.
Industry
Eligibility
18 Years and older
Enrollment
322 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
30
States / cities
Jonesboro, Arkansas • Little Rock, Arkansas • Hartford, Connecticut + 25 more
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Jul 20, 2026, 6:58 PM EDT
Recruiting Phase 1 Interventional

A Phase 1, Dose Escalation Trial of RP-A601 in Subjects With PKP2 Variant-Mediated Arrhythmogenic Cardiomyopathy (PKP2-ACM)

NCT05885412
View directory record Official record
Conditions
PKP2 Arrhythmogenic Cardiomyopathy (PKP2-ACM)
Interventions
RP-A601
Genetic
Lead sponsor
Rocket Pharmaceuticals Inc.
Industry
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
3
States / cities
La Jolla, California • Durham, North Carolina • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Jul 20, 2026, 6:58 PM EDT
Completed Not applicable Interventional Results available

Educational Videos to Address Racial Disparities in Implantable Cardioverter Defibrillator Therapy

NCT02819973
View directory record Official record
Conditions
Sudden Cardiac Death, Heart Failure
Interventions
Educational Video1, Educational Video 2, Usual Care 3
Other
Lead sponsor
Duke University
Other
Eligibility
21 Years and older
Enrollment
343 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
14
States / cities
San Francisco, California • Washington D.C., District of Columbia • Atlanta, Georgia + 11 more
Source: ClinicalTrials.gov public record
Updated Apr 20, 2021 · Synced Jul 20, 2026, 6:58 PM EDT
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 Jul 20, 2026, 6:58 PM EDT
Recruiting Phase 4 Interventional

Comparative Effectiveness of Carvedilol Versus Metoprolol Succinate in Heart Failure Patients With an Implantable Cardioverter Defibrillator

NCT06964464
View directory record Official record
Conditions
Heart Failure With Reduced Ejection Fraction (HFrEF), Sudden Cardiac Death, Ventricular Arrhythmia, Implantable Cardioverter Defibrillator (ICD), Beta-blocker Therapy, Cardiomyopathy
Interventions
Metoprolol Succinate, Carvedilol
Drug
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
2,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2031
U.S. locations
13
States / cities
Scottsdale, Arizona • Rome, Georgia • Shawnee Mission, Kansas + 9 more
Source: ClinicalTrials.gov public record
Updated Sep 17, 2025 · Synced Jul 20, 2026, 6:58 PM EDT
Completed Not applicable Interventional

PREPARE - Primary Prevention Parameters Evaluation

NCT00279279
View directory record Official record
Conditions
Tachycardia, Ventricular, Implantable Cardioverter Defibrillator (ICD), Fibrillation, Ventricular, Syncope
Interventions
Implanted Device
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
700 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
31
States / cities
Birmingham, Alabama • Mesa, Arizona • Phoenix, Arizona + 28 more
Source: ClinicalTrials.gov public record
Updated Oct 25, 2006 · Synced Jul 20, 2026, 6:58 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Morphological Predictors of Sudden Cardiac Death in Patients With Known Cardiomyopathies

NCT00312624
View directory record Official record
Conditions
Cardiomyopathy
Interventions
contrast-enhanced cardiac MRI
Procedure
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 9, 2011 · Synced Jul 20, 2026, 6:58 PM EDT
Active, not recruiting Not applicable Interventional

Assessment of Combined CCM and ICD Device in HFrEF

NCT05855135
View directory record Official record
Conditions
Heart Failure, Heart Failure With Reduced Ejection Fraction, Implantable Defibrillator User, CCM Therapy, Non-ischemic Cardiomyopathy, Ischemic Cardiomyopathy, Sudden Cardiac Arrest, Arrhythmias, Cardiac, Ventricular Tachycardia, Ventricular Fibrillation
Interventions
OPTIMIZER® Integra CCM-D System (Treatment Arm)
Device
Lead sponsor
Impulse Dynamics
Industry
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
59
States / cities
Glendale, Arizona • Mesa, Arizona • Phoenix, Arizona + 40 more
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Jul 20, 2026, 6:58 PM EDT
Completed Not applicable Interventional Results available

Long QT Syndrome and Sleep Apnea

NCT03678311
View directory record Official record
Conditions
Long QT Syndrome, Sleep Apnea
Interventions
Continuous Positive Airway Pressure (CPAP)
Device
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 1, 2020 · Synced Jul 20, 2026, 6:58 PM EDT
Active, not recruiting No phase listed Observational

Prediction of ARrhythmic Events With Positron Emission Tomography II

NCT03493516
View directory record Official record
Conditions
Sudden Cardiac Arrest, Ischemic Cardiomyopathy, Congestive Heart Failure
Interventions
PET scan quantifying sympathetic denervation using [18F]-LMI1195
Diagnostic Test
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years and older
Enrollment
302 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Jul 20, 2026, 6:58 PM EDT
Completed No phase listed Observational

T Wave Alternans in Hemodialysis

NCT00296543
View directory record Official record
Conditions
End Stage Renal Disease, Coronary Heart Disease, Congestive Heart Failure
Interventions
Not listed
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 19, 2011 · Synced Jul 20, 2026, 6:58 PM EDT