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 DysfunctionDogsTorsades de PointesTime FactorsNAV1.5 Voltage-Gated Sodium ChannelElectric CountershockAction PotentialsAmiodaroneMyocardiumHeart AtriaMyocytes, CardiacDigitalis GlycosidesMyocardial IschemiaBradycardiaModels, CardiovascularMyocardial InfarctionAconitineTreatment OutcomeDeath, SuddenTropaeolaceaeAtrial Premature ComplexesBody Surface Potential MappingPropafenoneMyocardial Reperfusion InjuryStereoisomerismHeart BlockFollow-Up StudiesEther-A-Go-Go Potassium ChannelsElectrophysiologyEncainideVoltage-Sensitive Dye ImagingRisk FactorsTelemetrySyncopeMolecular Sequence DataPericardiumModels, MolecularAlgorithmsCardiac ElectrophysiologyCardiomyopathiesTachycardia, Ectopic AtrialSodium ChannelsPacemaker, ArtificialTetralogy of FallotProcainamideConnexin 43MexiletineDisease Models, AnimalQuinidineMagnetic Resonance SpectroscopySotalolInformation Storage and RetrievalProspective StudiesNucleic Acid ConformationDisopyramideAtrioventricular BlockTachycardia, SinusMolecular StructureHeart FailureAdrenergic beta-AntagonistsArrhythmogenic Right Ventricular DysplasiaRetrospective StudiesAutonomic Nervous SystemHeart DiseasesPotassium Channels, Voltage-GatedEpinephrineMyocardial ContractionEchocardiographyLidocaineKCNQ1 Potassium ChannelRefractory Period, ElectrophysiologicalRabbitsAtrioventricular NodeSignal Processing, Computer-AssistedWolff-Parkinson-White SyndromeHeart Arrest