Arrhythmias, CardiacArrhythmia, SinusElectrocardiographyTachycardia, VentricularAnti-Arrhythmia AgentsVentricular FibrillationVentricular Premature ComplexesHeart Conduction SystemTachycardiaElectrocardiography, AmbulatoryCardiac Complexes, PrematureDeath, Sudden, CardiacLong QT SyndromeAtrial FibrillationTachycardia, SupraventricularHeart RateElectrophysiologic Techniques, CardiacAtrial FlutterDefibrillators, ImplantableCatheter AblationHeart VentriclesHeartCardiac Pacing, ArtificialFlecainideVentricular DysfunctionTorsades de PointesNAV1.5 Voltage-Gated Sodium ChannelDogsElectric CountershockAmiodaroneAction PotentialsMyocardiumHeart AtriaMyocytes, CardiacDigitalis GlycosidesTime FactorsMyocardial IschemiaBradycardiaModels, CardiovascularAconitineMyocardial InfarctionDeath, SuddenTropaeolaceaeAtrial Premature ComplexesBody Surface Potential MappingPropafenoneMyocardial Reperfusion InjuryHeart BlockEther-A-Go-Go Potassium ChannelsStereoisomerismEncainideElectrophysiologyFollow-Up StudiesVoltage-Sensitive Dye ImagingTelemetrySyncopeTreatment OutcomePericardiumCardiac ElectrophysiologyTachycardia, Ectopic AtrialCardiomyopathiesTetralogy of FallotSodium ChannelsProcainamidePacemaker, ArtificialConnexin 43MexiletineQuinidineRisk FactorsSotalolDisopyramideAtrioventricular BlockTachycardia, SinusDisease Models, AnimalAdrenergic beta-AntagonistsMagnetic Resonance SpectroscopyArrhythmogenic Right Ventricular DysplasiaAutonomic Nervous SystemHeart FailureProspective StudiesPotassium Channels, Voltage-GatedMyocardial ContractionEpinephrineHeart DiseasesEchocardiographyKCNQ1 Potassium ChannelRefractory Period, ElectrophysiologicalLidocaineAtrioventricular NodeWolff-Parkinson-White SyndromeNucleic Acid ConformationEpicardial MappingRetrospective StudiesCardiomyopathy, DilatedHeart ArrestMolecular StructureVentricular FunctionSignal Processing, Computer-AssistedModels, MolecularRabbits