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ClinicalTrials.gov public records Last synced Sep 9, 2026, 6:13 AM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 2 Interventional Results available

Long-term Efficacy Study of Sodium Channel Blocker in LQT3 Patients

NCT01648205
View directory record Official record
Conditions
Long QT Syndrome
Interventions
Placebo, Ranolazine
Drug
Lead sponsor
University of Rochester
Other
Eligibility
21 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 6, 2022 · Synced Sep 9, 2026, 6:13 AM EDT
Completed No phase listed Observational

Characteristics of Andersen-Tawil Syndrome

NCT00521794
View directory record Official record
Conditions
Andersen-Tawil Syndrome, Andersen Syndrome
Interventions
Not listed
Lead sponsor
University of Rochester
Other
Eligibility
10 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
4
States / cities
San Francisco, California • Kansas City, Kansas • Rochester, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 15, 2013 · Synced Sep 9, 2026, 6:13 AM EDT
Terminated Not applicable Interventional Results available

Low-dose Epinephrine Infusion Tests in Adolescent and Pediatric Patients

NCT00548886
View directory record Official record
Conditions
Congenital Disorders
Interventions
Epinephrine
Drug
Lead sponsor
Emory University
Other
Eligibility
3 Years to 18 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 5, 2017 · Synced Sep 9, 2026, 6:13 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Race Difference Moxifloxacin-induced QT Prolongation Between Healthy Chinese and Caucasian Volunteers

NCT02119091
View directory record Official record
Conditions
Cardiac Toxicity
Interventions
Moxifloxacin
Drug
Lead sponsor
Haiyan Li
Other
Eligibility
18 Years to 45 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 20, 2014 · Synced Sep 9, 2026, 6:13 AM EDT
Terminated Phase 1 Interventional

Effect of Potassium and Acetazolamide on People With Andersen-Tawil Syndrome

NCT00839501
View directory record Official record
Conditions
Andersen-Tawil Syndrome
Interventions
Potassium, Acetazolamide
Dietary Supplement · Drug
Lead sponsor
University of Rochester
Other
Eligibility
10 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jan 19, 2012 · Synced Sep 9, 2026, 6:13 AM EDT
Terminated Not applicable Interventional Results available

Optimize RV Selective Site Pacing Clinical Trial

NCT00422669
View directory record Official record
Conditions
Cardiac Pacing, Artificial, Cardiac Pacemaker, Artificial
Interventions
Medtronic Dual-Chamber Pacemaker, Medtronic SelectSecure 3830 Lead
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
205 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
16
States / cities
Bridgeport, Connecticut • Clearwater, Florida • Hudson, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated Jan 30, 2013 · Synced Sep 9, 2026, 6:13 AM EDT
Completed No phase listed Observational

The Effect of General Anesthesia on the Risk for Arrhythmia

NCT01174251
View directory record Official record
Conditions
Arrhythmia
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 7, 2013 · Synced Sep 9, 2026, 6:13 AM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Derivation of Human Induced Pluripotent Stem (iPS) Cells to Heritable Cardiac Arrhythmias

NCT02413450
View directory record Official record
Conditions
Inherited Cardiac Arrythmias, Long QT Syndrome (LQTS), Brugada Syndrome (BrS), Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT), Early Repolarization Syndrome (ERS), Arrhythmogenic Cardiomyopathy (AC, ARVD/C), Hypertrophic Cardiomyopathy (HCM), Dilated Cardiomyopathy (DCM), Muscular Dystrophies (Duchenne, Becker, Myotonic Dystrophy), Normal Control Subjects
Interventions
Not listed
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 85 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2031
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 15, 2026 · Synced Sep 9, 2026, 6:13 AM 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 Sep 9, 2026, 6:13 AM EDT
Terminated Phase 2 Interventional

Effectiveness of CRD-4730 in Participants With Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT)

NCT06005428
View directory record Official record
Conditions
CPVT1, Heart Defects, Congenital, Heart Diseases, Ventricular Tachycardia
Interventions
CRD-4730, Placebo
Drug
Lead sponsor
Cardurion Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 99 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
3
States / cities
Cincinnati, Ohio • Cleveland, Ohio • Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Sep 9, 2026, 6:13 AM EDT
Terminated Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Study of LQT-1213 on QTc-induced Prolongation in Healthy Adult Subjects (Part1) and on Congenital Long QT in Patients Diagnosed With Type 2 or 3 Long QT Syndrome (Part 2).

NCT05906732
View directory record Official record
Conditions
Long QT Syndrome
Interventions
LQT-1213, Placebo, Dofetilide 250 μg Cap
Drug
Lead sponsor
Thryv Therapeutics, Inc.
Industry
Eligibility
18 Years to 60 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 23, 2025 · Synced Sep 9, 2026, 6:13 AM EDT
Recruiting Not applicable Interventional

Comparing Direct vs Indirect Methods for Cascade Screening

NCT05348564
View directory record Official record
Conditions
Long QT Syndrome, Familial Hypercholesterolemia, Ethics, Genetic Testing
Interventions
Direct contact of family members for cascade screening of relevant variants
Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Lancaster, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Sep 9, 2026, 6:13 AM EDT
Withdrawn Phase 2Phase 3 Interventional

Empiric Quinidine for Asymptomatic Brugada Syndrome

NCT00789165
View directory record Official record
Conditions
Arrhythmia
Interventions
quinidine, no therapy
Drug
Lead sponsor
International Registry of Asymptomatic Brugada Syndrome
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2020
U.S. locations
1
States / cities
Wynnewood, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 12, 2020 · Synced Sep 9, 2026, 6:13 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Energy Drink on Cardiovascular Variables: A Randomized Controlled Trial

NCT03841838
View directory record Official record
Conditions
Cardiovascular Diseases
Interventions
Energy drink, Placebo drink
Other
Lead sponsor
University of the Pacific
Other
Eligibility
18 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Stockton, California
Source: ClinicalTrials.gov public record
Updated Sep 24, 2019 · Synced Sep 9, 2026, 6:13 AM EDT
Recruiting Phase 2Phase 3 Interventional

Evaluation of Efficacy and Safety of THRV-1268 in Long QT Syndrome Type 2 (LQTS 2)

NCT07277582
View directory record Official record
Conditions
Long QT Syndrome (LQTS) 2
Interventions
baseline lead-in, THRV-1268
Other · Drug
Lead sponsor
Thryv Therapeutics, Inc.
Industry
Eligibility
15 Years and older
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
9
States / cities
Scottsdale, Arizona • San Francisco, California • Chicago, Illinois + 6 more
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 9, 2026, 6:13 AM EDT
Completed No phase listed Observational

Effects Rapid Atrial Pacing Has on the Electrocardiogram (ECG) in Patients With Dual Chamber Pacemakers

NCT00883610
View directory record Official record
Conditions
Prolonged QT Interval
Interventions
Not listed
Lead sponsor
Vanderbilt University
Other
Eligibility
21 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 10, 2014 · Synced Sep 9, 2026, 6:13 AM EDT
Completed No phase listed Observational

Exercise in Genetic Cardiovascular Conditions

NCT02549664
View directory record Official record
Conditions
Hypertrophic Cardiomyopathy, Long QT Syndrome
Interventions
Not listed
Lead sponsor
Yale University
Other
Eligibility
8 Years to 60 Years
Enrollment
4,299 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
29
States / cities
Tucson, Arizona • Orange, California • San Diego, California + 24 more
Source: ClinicalTrials.gov public record
Updated Sep 4, 2023 · Synced Sep 9, 2026, 6:13 AM EDT
Terminated Not applicable Interventional

Cara CDRM (Conduction Disturbance Risk Monitor) 2.0

NCT05465655
View directory record Official record
Conditions
Transcatheter Aortic Valve Replacement
Interventions
ECG monitoring for Conduction Disturbances
Other
Lead sponsor
Cara Medical Ltd
Industry
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 3, 2025 · Synced Sep 9, 2026, 6:13 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Novel Approaches for Minimizing Drug-Induced QT Interval Lengthening

NCT04675788
View directory record Official record
Conditions
Long QT Syndrome, Abnormalities, Drug-Induced
Interventions
Progesterone, Ibutilide, Testosterone, Placebo
Drug
Lead sponsor
Indiana University
Other
Eligibility
50 Years to 99 Years
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
3
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Sep 9, 2026, 6:13 AM EDT
Not listed No phase listed Observational

South Asian Arrhythmogenic Cardiomyopathy Registry

NCT04895540
View directory record Official record
Conditions
Arrhythmogenic Right Ventricular Cardiomyopathy, Arrhythmogenic Right Ventricular Dysplasia, Arrhythmogenic Ventricular Cardiomyopathy, Arrhythmogenic Cardiomyopathy, Ventricular Tachycardia, Sudden Cardiac Death
Interventions
ECG, Echocardiography, Cardiac MRI, Ambulatory ECG recording, Cardiac EP study, All study subjects will undergo sample collection for genetic testing.
Diagnostic Test · Genetic
Lead sponsor
Sheri Kashmir Institute of Medical Sciences
Other
Eligibility
Not listed
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 1, 2021 · Synced Sep 9, 2026, 6:13 AM EDT
Terminated No phase listed Observational

Radiofrequency Ablation of Ectopic Atrial Tachycardia

NCT00267982
View directory record Official record
Conditions
Congenital Disorders
Interventions
Not listed
Lead sponsor
Children's Healthcare of Atlanta
Other
Eligibility
Up to 21 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1992 – 2008
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 5, 2011 · Synced Sep 9, 2026, 6:13 AM EDT
Terminated Not applicable Interventional Results available

Low Cost QTc Meter for Long QT Syndrome Screening in Primary Care

NCT04441892
View directory record Official record
Conditions
Long QT Syndrome
Interventions
QTc Meter
Device
Lead sponsor
Mayo Clinic
Other
Eligibility
Up to 5 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 24, 2023 · Synced Sep 9, 2026, 6:13 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Dose Ranging Escalation Study of Tramadol Hydrochloride in Healthy Volunteers

NCT01947920
View directory record Official record
Conditions
Healthy
Interventions
Tramadol HCl, 50 mg, Placebo
Drug
Lead sponsor
Janssen Scientific Affairs, LLC
Industry
Eligibility
18 Years to 45 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Dec 15, 2014 · Synced Sep 9, 2026, 6:13 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Phase 1 Study of LQT-1213 in Healthy Adults

NCT05759962
View directory record Official record
Conditions
Long QT Syndrome
Interventions
LQT-1213, Placebo
Drug · Other
Lead sponsor
Thryv Therapeutics, Inc.
Industry
Eligibility
18 Years to 60 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Cypress, California
Source: ClinicalTrials.gov public record
Updated Sep 25, 2023 · Synced Sep 9, 2026, 6:13 AM EDT