Arrhythmias, CardiacPhenotypeElectrocardiographyMyocytes, CardiacArrhythmia, SinusAnti-Arrhythmia AgentsDeath, Sudden, CardiacHeartLong QT SyndromeHeart Conduction SystemTachycardia, VentricularVentricular FibrillationVentricular Premature ComplexesElectrocardiography, AmbulatoryCardiac Complexes, PrematureTachycardiaHeart RateNAV1.5 Voltage-Gated Sodium ChannelAtrial FibrillationEncainideMyocardiumHeart VentriclesCardiac OutputCardiac Pacing, ArtificialEther-A-Go-Go Potassium ChannelsCardiac Surgical ProceduresModels, CardiovascularDeath, SuddenPotassium Channels, Voltage-GatedMutationKCNQ1 Potassium ChannelMoricizineBradycardiaCardiac ElectrophysiologyTime FactorsHeart DiseasesAction PotentialsFlecainideDogsSodium ChannelsCatheter AblationAtrial FlutterHeart AtriaElectrophysiologic Techniques, CardiacMyocardial ContractionTachycardia, SupraventricularDigitalis GlycosidesAtrial Premature ComplexesHeart ArrestChlorofluorocarbons, MethaneMyocardial InfarctionHeart FailureKCNQ Potassium ChannelsAmiodaroneCardiomyopathiesTorsades de PointesCardiomegalyMyocardial IschemiaDefibrillators, ImplantableElectrophysiologyDisease Models, AnimalHypokalemiaPotassium ChannelsAconitineHeart BlockCardiac Imaging TechniquesEchocardiographyPericardiumAndersen SyndromeBody Surface Potential MappingElectric CountershockRisk FactorsVentricular FunctionTreatment OutcomeTelemetryRyanodine Receptor Calcium Release ChannelFollow-Up StudiesAutonomic Nervous SystemBlood PressureSyncopeHemodynamicsCalciumCardiac CatheterizationPacemaker, ArtificialCardiac TamponadeMolecular Sequence DataPatch-Clamp TechniquesProspective StudiesCardiomyopathy, DilatedCells, CulturedMyocardial Reperfusion InjuryBrugada SyndromeVentricular Function, LeftCardiotonic AgentsProcainamideVentricular DysfunctionEndocardiumTachycardia, Ectopic AtrialMice, TransgenicConnexin 43