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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Fibrillation, Ventricular Clear all
Completed Phase 3 Interventional Results available

Amiodarone, Lidocaine or Neither for Out-Of-Hospital Cardiac Arrest Due to Ventricular Fibrillation or Tachycardia

NCT01401647
View directory record Official record
Conditions
Cardiac Arrest
Interventions
amiodarone, Lidocaine, Normal saline
Drug · Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
3,024 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
7
States / cities
Birmingham, Alabama • San Diego, California • Portland, Oregon + 4 more
Source: ClinicalTrials.gov public record
Updated Apr 16, 2017 · Synced Jul 22, 2026, 2:19 AM EDT
Completed Not applicable Interventional Results available

Vest Prevention of Early Sudden Death Trial and VEST Registry

NCT01446965
View directory record Official record
Conditions
Myocardial Infarction, Ventricular Dysfunction, Sudden Death, Ventricular Tachycardia, Ventricular Fibrillation
Interventions
wearable defibrillator
Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
2,348 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2019
U.S. locations
57
States / cities
Anchorage, Alaska • Fresno, California • Salinas, California + 47 more
Source: ClinicalTrials.gov public record
Updated Jan 19, 2021 · Synced Jul 22, 2026, 2:19 AM 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 22, 2026, 2:19 AM EDT
Completed No phase listed Observational

Electrocardiographic Diagnostic Performance of the Apple Watch Augmented With an Artificial Intelligence Algorithm

NCT05167058
View directory record Official record
Conditions
Atrial Fibrillation, Tachycardia, Bradycardia, Premature Supraventricular Beat, Premature Ventricular Contraction
Interventions
Cardiologs Platform
Device
Lead sponsor
Cardiologs Technologies
Industry
Eligibility
18 Years and older
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
3
States / cities
Hackensack, New Jersey • Ridgewood, New Jersey • New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 2, 2023 · Synced Jul 22, 2026, 2:19 AM EDT
Not yet recruiting Phase 3 Interventional

MAGNEsium With meToprolol for Rate Control In Atrial Fibrillation

NCT07632157
View directory record Official record
Conditions
Atrial Flutter With Rapid Ventricular Response
Interventions
Magnesium Sulfate 2g, Magnesium Sulfate 4g, Saline (0.9% NaCl)
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
196 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Oak Lawn, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Jul 22, 2026, 2:19 AM EDT
Completed No phase listed Observational

Prognostic Significance of T Wave Alternans

NCT00006501
View directory record Official record
Conditions
Heart Diseases, Ventricular Arrhythmia, Ventricular Fibrillation, Death, Sudden, Cardiac, Heart Arrest
Interventions
ECG
Procedure
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
549 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 22, 2015 · Synced Jul 22, 2026, 2:19 AM 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, 2:19 AM EDT
Completed Not applicable Interventional

SmartCPR Trial: An Analysis of a Waveform-Based Automated External Defibrillation (AED) Algorithm on Survival From Out-of-Hospital Ventricular Fibrillation

NCT00535106
View directory record Official record
Conditions
Ventricular Fibrillation, Cardiac Arrest
Interventions
Automated external defibrillator (Philips FR2+ AED), SmartCPR, Delayed defibrillation
Device · Other
Lead sponsor
New York City Fire Department
Government
Eligibility
Not listed
Enrollment
900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 18, 2009 · Synced Jul 22, 2026, 2:19 AM EDT
Recruiting Phase 3 Interventional

Comparing Magnesium 2g Versus 4g Versus Placebo in the Incidence of Treating AFF RVR

NCT06376916
View directory record Official record
Conditions
Tachycardia Atrial, Atrial Fibrillation, Atrial Flutter With Rapid Ventricular Response
Interventions
Magnesium Sulfate 2 G, Magnesium Sulfate 4 G, Saline
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
153 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Oak Lawn, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 27, 2025 · Synced Jul 22, 2026, 2:19 AM 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 22, 2026, 2:19 AM EDT
Terminated Phase 2 Interventional Results available

The Use of Ranolazine for Atrial Fibrillation and Diastolic Heart Failure

NCT01887353
View directory record Official record
Conditions
Atrial Fibrillation, Heart Failure
Interventions
Ranolazine, Placebo
Drug
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Murray, Utah
Source: ClinicalTrials.gov public record
Updated Jul 19, 2015 · Synced Jul 22, 2026, 2:19 AM EDT
Not listed Not applicable Interventional

Effect of taVNS on Heart Rate in Persistent Atrial Fibrillation

NCT05944575
View directory record Official record
Conditions
Atrial Fibrillation, Persistent
Interventions
active taVNS, sham-taVNS
Device
Lead sponsor
Burrell College of Health Sciences
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Las Cruces, New Mexico
Source: ClinicalTrials.gov public record
Updated Jul 13, 2023 · Synced Jul 22, 2026, 2:19 AM EDT
Completed No phase listed Observational

The Signal-averaged ElectrocArdiogram in Long Term Follow-up of Chronic CHagas Disease - RIO de Janeiro Cohort

NCT01340963
View directory record Official record
Conditions
Chagas Cardiomyopathy, Cardiac Arrhythmia, Stroke, Left Ventricular Function Systolic Dysfunction, Cardiac Death
Interventions
Not listed
Lead sponsor
Universidade Gama Filho
Other
Eligibility
18 Years to 75 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 9, 2013 · Synced Jul 22, 2026, 2:19 AM 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, 2:19 AM EDT
Completed Phase 4 Interventional Results available

Diltiazem in the Treatment of Atrial Fibrillation or Atrial Flutter With Rapid Ventricular Rate

NCT05661942
View directory record Official record
Conditions
Atrial Fibrillation With Rapid Ventricular Response, Hypotension Drug-Induced
Interventions
Calcium pre-treatment, Placebo
Drug · Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Oak Lawn, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 9, 2025 · Synced Jul 22, 2026, 2:19 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Physicians in Training and Critical Care Nurses Performance in Medical Code Events: Effect of Simulation-Based Training

NCT02707185
View directory record Official record
Conditions
Ventricular Fibrillation
Interventions
Simulation-Based Training
Behavioral
Lead sponsor
St. Luke's-Roosevelt Hospital Center
Other
Eligibility
18 Years and older
Enrollment
157 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 13, 2016 · Synced Jul 22, 2026, 2:19 AM EDT
Terminated Phase 3 Interventional Results available

Effect of Sodium Zirconium Cyclosilicate on Arrythmia-related Cardiovascular Outcomes in Participants on Chronic Hemodialysis With Recurrent Hyperkalemia (DIALIZE-Outcomes)

NCT04847232
View directory record Official record
Conditions
Hyperkalemia
Interventions
Sodium Zirconium Cyclosilicate (SZC), SZC Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 130 Years
Enrollment
2,690 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
57
States / cities
Huntsville, Alabama • Mesa, Arizona • Bakersfield, California + 47 more
Source: ClinicalTrials.gov public record
Updated Jun 17, 2025 · Synced Jul 22, 2026, 2:19 AM EDT
Not listed Phase 3 Interventional

Cardiac Sympathetic Denervation for Prevention of Ventricular Tachyarrhythmias

NCT01013714
View directory record Official record
Conditions
Sudden Cardiac Death, Ventricular Tachycardia, Ventricular Fibrillation, Cardiomyopathy
Interventions
Cardiac Sympathetic Denervation (CSD), Routine Care
Procedure · Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
3
States / cities
Los Angeles, California • Portland, Oregon • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 18, 2024 · Synced Jul 22, 2026, 2:19 AM EDT
Completed Phase 2Phase 3 Interventional

Safety and Effectiveness of Cardiac Resynchronization Therapy With Defibrillation

NCT00387803
View directory record Official record
Conditions
Heart Failure, Congestive, Ventricular Fibrillation, Tachycardia, Ventricular
Interventions
Cardiac Resynchronization Therapy with Defibrillation
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
Not listed
Enrollment
581 participants
Timeline
1998 – 2001
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 24, 2007 · Synced Jul 22, 2026, 2:19 AM EDT
Not listed Phase 2 Interventional

Botulinum Toxin Injection for Preventing Secondary Atrial Fibrillation in Patient With Supra-ventricular Tachyarrythmias

NCT02008461
View directory record Official record
Conditions
Supra-ventricular Tachyarrhythmias
Interventions
radiofrequency ablation, botulinum toxin injection
Procedure · Drug
Lead sponsor
Meshalkin Research Institute of Pathology of Circulation
Network
Eligibility
18 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Sep 22, 2015 · Synced Jul 22, 2026, 2:19 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 Jul 22, 2026, 2:19 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Development of CIRC Technologies

NCT05654272
View directory record Official record
Conditions
Cardiovascular Diseases, Heart Failure, Ischemic Heart Disease, Non-ischemic Cardiomyopathy, Valvular Heart Disease, Metabolic Cardiomyopathy, Congenital Heart Disease, Aortic Diseases, Atrial Fibrillation, Ventricular Fibrillation
Interventions
MRI
Diagnostic Test
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2042
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Jul 22, 2026, 2:19 AM EDT
Terminated Not applicable Interventional Results available

Advanced Reperfusion Strategies for Refractory Cardiac Arrest

NCT03880565
View directory record Official record
Conditions
Cardiac Arrest, Extracorporeal Membrane Oxygenation Complication, Ventricular Fibrillation, Pulseless Ventricular Tachycardia, Out-Of-Hospital Cardiac Arrest
Interventions
Early Extracorporeal Membrane Oxygenation (ECMO) Facilitated Resuscitation, Standard Advanced Cardiac Life Support (ACLS) Resuscitation
Device
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 9, 2022 · Synced Jul 22, 2026, 2:19 AM 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 Jul 22, 2026, 2:19 AM EDT