Arrhythmias, CardiacArrhythmia, SinusElectrocardiographyTachycardia, VentricularAnti-Arrhythmia AgentsVentricular FibrillationVentricular Premature ComplexesHeart Conduction SystemTachycardiaElectrocardiography, AmbulatoryCardiac Complexes, PrematureDeath, Sudden, CardiacAtrial FibrillationLong QT SyndromeHeart RateTachycardia, SupraventricularAtrial FlutterElectrophysiologic Techniques, CardiacDefibrillators, ImplantableCatheter AblationHeart VentriclesHeartTreatment OutcomeTime FactorsFlecainideCardiac Pacing, ArtificialDogsAmiodaroneVentricular DysfunctionTorsades de PointesAction PotentialsMyocardiumElectric CountershockNAV1.5 Voltage-Gated Sodium ChannelHeart AtriaFollow-Up StudiesMyocytes, CardiacBradycardiaDigitalis GlycosidesMyocardial IschemiaPropafenoneModels, CardiovascularMyocardial InfarctionDrug-Related Side Effects and Adverse ReactionsEther-A-Go-Go Potassium ChannelsAconitineProspective StudiesDeath, SuddenElectrophysiologyDose-Response Relationship, DrugAtrial Premature ComplexesBody Surface Potential MappingHeart BlockMyocardial Reperfusion InjuryEncainideVoltage-Sensitive Dye ImagingDouble-Blind MethodDisease Models, AnimalSyncopeTelemetryRetrospective StudiesMexiletineProcainamideRisk FactorsDisopyramidePericardiumAdrenergic beta-AntagonistsSodium ChannelsSotalolCardiac ElectrophysiologyTachycardia, Ectopic AtrialRecurrenceCardiomyopathiesLidocainePacemaker, ArtificialTetralogy of FallotQuinidineConnexin 43Atrioventricular BlockHeart FailureHeart DiseasesEpinephrinePotassium Channels, Voltage-GatedTachycardia, SinusPostoperative ComplicationsEchocardiographyMyocardial ContractionBlood PressureAutonomic Nervous SystemArrhythmogenic Right Ventricular DysplasiaClinical Trials as TopicWolff-Parkinson-White SyndromeDrug Therapy, CombinationKCNQ1 Potassium ChannelAntipsychotic AgentsAtrioventricular NodeRefractory Period, ElectrophysiologicalAdministration, OralVentricular FunctionEpicardial Mapping