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

Arrhythmias in Myotonic Muscular Dystrophy

NCT00622453
View directory record Official record
Conditions
Muscular Dystrophy, Arrhythmia, Sudden Cardiac Death
Interventions
Screening
Other
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
448 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2015
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Feb 13, 2018 · Synced Sep 24, 2026, 2:27 PM EDT
Completed No phase listed Observational Results available

Heart Failure Optimization Study

NCT03016754
View directory record Official record
Conditions
Sudden Cardiac Death, Sudden Cardiac Arrest, Heart Failure, Heart Failure Low Output
Interventions
Wearable Cardioverter Defibrillator
Device
Lead sponsor
Zoll Medical Corporation
Industry
Eligibility
18 Years and older
Enrollment
602 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
39
States / cities
Birmingham, Alabama • West Hills, California • Fernandina Beach, Florida + 34 more
Source: ClinicalTrials.gov public record
Updated Mar 23, 2025 · Synced Sep 24, 2026, 2:27 PM EDT
Completed No phase listed Observational

Prediction of ARrhythmic Events With Positron Emission Tomography

NCT01400334
View directory record Official record
Conditions
Ischemic Cardiomyopathy, Hibernating Myocardium, Nerve; Disorder, Sympathetic
Interventions
Positron Emission Tomography
Radiation
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years and older
Enrollment
257 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2012
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Oct 11, 2020 · Synced Sep 24, 2026, 2:27 PM EDT
Terminated Not applicable Interventional Results available

Wearable Cardioverter Defibrillator in Hemodialysis Patients (WED-HED) Study

NCT02481206
View directory record Official record
Conditions
Sudden Cardiac Death, Sudden Cardiac Arrest
Interventions
Wearable Cardioverter Defibrillator
Device
Lead sponsor
Zoll Medical Corporation
Industry
Eligibility
50 Years and older
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
31
States / cities
Corona, California • Downey, California • Escondido, California + 28 more
Source: ClinicalTrials.gov public record
Updated Jan 18, 2021 · Synced Sep 24, 2026, 2:27 PM EDT
Withdrawn No phase listed Observational

Analyzing Gene Regions That May Interact With the Effectiveness of High Blood Pressure Drugs

NCT00573092
View directory record Official record
Conditions
Myocardial Infarction, Cerebrovascular Accident, Death, Sudden, Cardiac
Interventions
Not listed
Lead sponsor
University of Washington
Other
Eligibility
30 Years to 79 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2016
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Nov 8, 2016 · Synced Sep 24, 2026, 2:27 PM EDT
Active, not recruiting No phase listed Observational

BAsel Syncope EvaLuation (BASEL IX) Study

NCT01548352
View directory record Official record
Conditions
Syncope
Interventions
Not listed
Lead sponsor
University Hospital, Basel, Switzerland
Other
Eligibility
40 Years and older
Enrollment
3,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 14, 2025 · Synced Sep 24, 2026, 2:27 PM EDT
Recruiting No phase listed Observational

HeartStart HS1 Defibrillator* Event Registry

NCT04840797
View directory record Official record
Conditions
Sudden Cardiac Arrest
Interventions
HeartStart HS1
Device
Lead sponsor
Heartstream US LLC
Industry
Eligibility
Not listed
Enrollment
1,400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2030
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Sep 24, 2026, 2:27 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 Sep 24, 2026, 2:27 PM EDT
Completed Not applicable Interventional

A Pilot Trial of Patient Decision Aids for Implantable Cardioverter-Defibrillators (ICDs)

NCT02026102
View directory record Official record
Conditions
Systolic Heart Failure, Sudden Cardiac Death
Interventions
ICD Decision Aid Toolkit
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
3
States / cities
Aurora, Colorado • Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Oct 30, 2019 · Synced Sep 24, 2026, 2:27 PM EDT
Recruiting Not applicable Interventional

Programmed Ventricular Stimulation to Risk Stratify for Early Cardioverter-Defibrillator (ICD) Implantation to Prevent Tachyarrhythmias Following Acute Myocardial Infarction (PROTECT-ICD)

NCT03588286
View directory record Official record
Conditions
Sudden Cardiac Death
Interventions
Electrophysiology study (EPS), Standard Care, Cardiac Magnetic Resonance (CMR)
Procedure · Other
Lead sponsor
Western Sydney Local Health District
Other
Eligibility
18 Years to 85 Years
Enrollment
1,058 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 6, 2024 · Synced Sep 24, 2026, 2:27 PM EDT
Withdrawn No phase listed Observational

The Ability Of The PD2i Cardiac Analyzer To Predict Risk Of Ventricular Tachyarrhythmic Events

NCT00510731
View directory record Official record
Conditions
Tachycardia, Ventricular, Cardiac Sudden Death
Interventions
Not listed
Lead sponsor
Vicor Technologies, Inc.
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
19
States / cities
Los Angeles, California • San Ramon, California • Walnut Creek, California + 14 more
Source: ClinicalTrials.gov public record
Updated Dec 8, 2015 · Synced Sep 24, 2026, 2:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study of Early Hormone Replacement Therapy on Risk Factors for Sudden Cardiac Death

NCT00580775
View directory record Official record
Conditions
Menopausal Women
Interventions
Not listed
Lead sponsor
Yale University
Other
Eligibility
42 Years to 58 Years · Female only
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2010
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 21, 2015 · Synced Sep 24, 2026, 2:27 PM EDT
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 Sep 24, 2026, 2:27 PM EDT
Terminated Not applicable Interventional

Comparative Effectiveness of Prophylactic ICD Versus Non-ICD Therapy

NCT06543446
View directory record Official record
Conditions
Heart Failure With Reduced Ejection Fraction
Interventions
ICD implantation
Procedure
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
3,290 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
13
States / cities
Portland, Maine • Baltimore, Maryland • Boston, Massachusetts + 10 more
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Sep 24, 2026, 2:27 PM EDT
Completed No phase listed Observational

The Role of Electrophysiology Testing in Survivors of Unexplained Cardiac Arrest

NCT03079414
View directory record Official record
Conditions
Sudden Cardiac Death
Interventions
Invasive Electrophysiology Study
Procedure
Lead sponsor
Western University, Canada
Other
Eligibility
Not listed
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2025
U.S. locations
11
States / cities
Los Angeles, California • San Diego, California • San Francisco, California + 8 more
Source: ClinicalTrials.gov public record
Updated Jun 14, 2025 · Synced Sep 24, 2026, 2:27 PM EDT
Completed Not applicable Interventional

Feasibility Study of Remote Support for Implantable Pulse Generator (IPG)/Implantable Cardioverter Defibrillator (ICD) Implant

NCT01809652
View directory record Official record
Conditions
Bradycardia, Sudden Cardiac Arrest
Interventions
Remote Implant Support Capability
Other
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 23, 2014 · Synced Sep 24, 2026, 2:27 PM EDT
Terminated Phase 3 Interventional Results available

Effect of Eleclazine on Shortening of the QT Interval, Safety, and Tolerability in Adults With Long QT Syndrome Type 3

NCT02300558
View directory record Official record
Conditions
Long QT Syndrome Type 3
Interventions
Eleclazine, Eleclazine placebo
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years to 70 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
3
States / cities
Rochester, Minnesota • New York, New York • Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jan 11, 2018 · Synced Sep 24, 2026, 2:27 PM 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 Sep 24, 2026, 2:27 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

AI-guided Prediction and Treatment of Cardiac Arrest

NCT07452016
View directory record Official record
Conditions
Sudden Cardiac Arrest
Interventions
Machine learning-guided cardiac arrest prediction device
Device
Lead sponsor
MetroHealth Medical Center
Other
Eligibility
18 Years and older
Enrollment
68 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 15, 2026 · Synced Sep 24, 2026, 2:27 PM EDT
Recruiting No phase listed Observational

Fetal Electrophysiologic Abnormalities in High-Risk Pregnancies Associated With Fetal Demise

NCT03775954
View directory record Official record
Conditions
High Risk Pregnancy, Congenital Heart Disease, Fetal Hydrops, Twin Monochorionic Monoamniotic Placenta, Gastroschisis, Fetal Demise, Stillbirth, Fetal Arrhythmia, Long QT Syndrome, Intrauterine Fetal Death, Sudden Infant Death, Pregnancy Loss, Twin Twin Transfusion Syndrome, Birth Defect, Fetal Cardiac Anomaly, Fetal Cardiac Disorder, Fetal Death, Brugada Syndrome, Fetal Tachycardia
Interventions
Fetal Magnetocardiogram and Neonatal Electrocardiogram, Substudy only: Maternal/Infant Pharmacogenomic assessment postnatally
Diagnostic Test · Genetic
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Sep 24, 2026, 2:27 PM EDT
Completed No phase listed Observational

Inflammation, Cardiac Sympathetic Innervation, and Arrhythmic Sudden Death

NCT01919983
View directory record Official record
Conditions
Ischemic Cardiomyopathy, Dilated Cardiomyopathy, Inflammation, Sudden Cardiac Death
Interventions
Not listed
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 7, 2017 · Synced Sep 24, 2026, 2:27 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 Sep 24, 2026, 2:27 PM EDT
Completed No phase listed Observational

Heart and Skeletal Muscle Problems in Neuroacanthocytosis

NCT00007228
View directory record Official record
Conditions
Choreatic Disorder
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 24, 2026, 2:27 PM EDT
Recruiting Not applicable Interventional

Electroanatomic Interactions Between Transcatheter Pulmonary Valve Prostheses and Anatomic Isthmuses in Repaired Tetralogy of Fallot

NCT05236153
View directory record Official record
Conditions
Tetralogy of Fallot, Ventricular Tachycardia, Sudden Cardiac Death
Interventions
Electroanatomic substrate mapping
Diagnostic Test
Lead sponsor
Boston Children's Hospital
Other
Eligibility
Not listed
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 7, 2023 · Synced Sep 24, 2026, 2:27 PM EDT