NCT04581408
Mutation-specific Therapy for the Long QT Syndrome treatment 2 recruiting NCT01849003
Study of the Effect of GS-6615 in Subjects With LQT-3 treatment 1 completed NCT02549664
Exercise in Genetic Cardiovascular Conditions No drug interventions Not Available Not Available completed NCT05348564
Comparing Direct vs Indirect Methods for Cascade Screening No drug interventions screening Not Available recruiting NCT05521451
Clinical Cohort Study - TRUST No drug interventions Not Available Not Available recruiting NCT02439645
A Registry to Determine the Clinical and Genetic Risk Factors for Torsade De Pointes No drug interventions Not Available Not Available terminated NCT02412098
Pharmacokinetics of Eleclazine in Adults With Normal and Impaired Hepatic Function treatment 1 completed NCT03642405
Drug-induced Repolarization ECG Changes No drug interventions Not Available Not Available unknown_status NCT04699097
The Effect of Azithromycin Use on Conduction System of Heart in COVID-19 Positive Children Not Available Not Available completed NCT03678311
Long QT Syndrome and Sleep Apnea No drug interventions treatment Not Available completed NCT04650009
Physical Activity in Children With Inherited Cardiac Diseases No drug interventions Not Available Not Available completed NCT04715256
Evaluation of the Effects of KCNQ1 Mutation on Insulin Tolerance and Obsessive Compulsive Features in Long QT Romano-Ward Syndrome Patients. No drug interventions basic_science Not Available unknown_status NCT06546137
National Network for Cardiovascular Genomics: Advancing Cardiovascular Healthcare for Hereditary Diseases in Brazil's Unified Health System Through a Multicenter Registry No drug interventions Not Available Not Available not_yet_recruiting NCT00221832
Molecular Genetic Screening and Identification of Congenital Arrhythmogenic Diseases No drug interventions Not Available Not Available unknown_status NCT05906732
Study of LQT-1213 on QTc-induced Prolongation in Healthy Adult Subjects (Part1) and on Congenital Long QT in Patients Diagnosed With Type 1, 2 or 3 Long QT Syndrome (Part 2). treatment 1 / 2 recruiting NCT04169100
Novel Form of Acquired Long QT Syndrome prevention 4 recruiting NCT04728100
LQT and Smartphone/Smartwatch No drug interventions Not Available Not Available completed NCT05903313
A Study to Evaluate Accuracy and Validity of the Chang Gung ECG Abnormality Detection Software No drug interventions Not Available Not Available enrolling_by_invitation NCT02775513
Metabolism of Patients With Genetically Caused Cardiac Arrhythmia No drug interventions Not Available Not Available unknown_status NCT03544918
Prevalence of Congenital Long QT Syndrome and Acquired QT Prolongation in a Hospital Cohort No drug interventions Not Available Not Available completed NCT06375863
QT Changes in Geriatric Patients: a Comparison of Spinal and General Anesthesia No drug interventions diagnostic Not Available completed NCT01705925
Multicenter Evaluation of Children and Young Adults With Genotype Positive Long QT Syndrome No drug interventions Not Available Not Available completed NCT00588965
Effect of Beta-blocker Therapy on QTc Response in Exercise and Recovery in Normal Subjects basic_science Not Available completed NCT05759962
Phase 1 Study of LQT-1213 in Healthy Adults No drug interventions other 1 completed NCT02680080
Effect of Grapefruit on QT Interval in Healthy Volunteers and Patients With Congenital Long QT Syndrome diagnostic Not Available completed NCT02876380
Prospective Identification of Long QT Syndrome in Fetal Life No drug interventions Not Available Not Available completed NCT04336644
Continuous Versus Intermittent cARdiac Electrical moNitorinG No drug interventions diagnostic Not Available recruiting NCT05274646
Impact on Risk Stratification of Overlap Syndrome Phenotype in Patients With E1784K Mutation in SCN5A No drug interventions Not Available Not Available recruiting NCT02814981
Hydroxyzine and Risk of Prolongation of QT Interval No drug interventions Not Available Not Available unknown_status NCT00005250
Linkage Study of Long QT Syndrome In An Amish Kindred No drug interventions Not Available Not Available completed NCT01903564
Fetal and Neonatal Magnetophysiology No drug interventions Not Available Not Available completed NCT00488254
The Long QT Syndrome in Pregnancy No drug interventions Not Available Not Available completed NCT03775954
Fetal Electrophysiologic Abnormalities in High-Risk Pregnancies Associated With Fetal Demise No drug interventions Not Available Not Available recruiting NCT03182777
Safety of Local Dental Anesthesia in Patients With Cardiac Channelopathies No drug interventions supportive_care Not Available completed NCT01648205
Long-term Efficacy Study of Sodium Channel Blocker in LQT3 Patients treatment 2 completed NCT03834883
Reducing the Risk of Drug-Induced QT Interval Lengthening in Women prevention 4 completed NCT04675788
Novel Approaches for Minimizing Drug-Induced QT Interval Lengthening treatment 4 recruiting NCT02412709
Long QT Syndrome Screening in Newborns No drug interventions screening 2 unknown_status NCT04124237
Long Term Monitoring for Risk of Sudden Death No drug interventions Not Available Not Available completed NCT02365532
Effect of Oral GS-6615 on Dofetilide-Induced QT Prolongation, Safety, and Tolerability in Healthy Adults treatment 1 completed NCT00292032
Registry of Unexplained Cardiac Arrest No drug interventions Not Available Not Available completed NCT00316459
Study Evaluating the Effects of Multiple Oral Doses of ERB-041 on Cardiac Repolarization in Healthy Subjects treatment 1 completed NCT03783975
KCNQ1 Cascade Screening No drug interventions screening Not Available terminated NCT00335036
Pediatric Lead Extractability and Survival Evaluation (PLEASE) No drug interventions treatment Not Available terminated NCT04712136
Healthy-related Quality of Life and Physical Activity of Children With Cardiac Malformations No drug interventions other Not Available completed NCT02581241
Abnormal QT-Response to the Sudden Tachycardia Provoked by Standing in Individuals With Drug-induced Long QT Syndrome No drug interventions diagnostic Not Available completed NCT02439658
Genetics of QT Prolongation With Antiarrhythmics Not Available Not Available unknown_status NCT04074122
Electromechanical Profiling of the Long-QT Syndrome (LQTS) No drug interventions Not Available Not Available unknown_status NCT05964322
Cardiac Rehabilitation of Children and Adolescent With Long QT Syndrome No drug interventions Not Available Not Available active_not_recruiting NCT03868657
The Physiological Effects of Human Ether-a-go-go-Related Gene (hERG)Blockade on Metabolism basic_science Not Available completed NCT02082431
Determine the Incidence of Long QT Amongst a Large Cohort of Subjects Diagnosed With Unilateral or Bilateral Sensorineural Hearing Loss. No drug interventions Not Available Not Available completed NCT00005176
Long QT Syndrome-Population Genetics and Cardiac Studies No drug interventions Not Available Not Available completed NCT04328376
Measurement of the Electromechanical Window to Improve the Diagnosis of Congenital Long QT Syndrome No drug interventions diagnostic Not Available completed NCT02441829
Pharmacokinetics of Eleclazine in Adults With Normal and Impaired Renal Function treatment 1 completed NCT02425189
The Canadian National Long QT Syndrome Registry No drug interventions Not Available Not Available completed NCT04441892
Low Cost QTc Meter for Long QT Syndrome Screening in Primary Care No drug interventions screening Not Available terminated NCT02513940
Influence of Testosterone Administration on Drug-Induced QT Interval Prolongation and Torsades de Pointes prevention 4 completed NCT06087367
Building of a Diagnostic/Prognostic Database for Human ERG Variant Effects No drug interventions Not Available Not Available recruiting NCT00005367
Epidemiology of Long QTand Asian Sudden Death in Sleep No drug interventions Not Available Not Available completed NCT04706104
QT Measurement Techniques and Anesthesia Management No drug interventions Not Available Not Available completed NCT00399412
ECG Signal Collection From Long QT Syndrome, Wide QRS Complexes, Heart Failure, and Cardiac Resynchronization Patients No drug interventions Not Available Not Available completed NCT04189822
Hearts in Rhythm Organization (HiRO)National Registry and Bio Bank No drug interventions Not Available Not Available enrolling_by_invitation NCT02413450
Derivation of Human Induced Pluripotent Stem (iPS) Cells to Heritable Cardiac Arrhythmias No drug interventions Not Available Not Available enrolling_by_invitation