Arrhythmias, CardiacTachycardia, VentricularVentricular FibrillationVentricular Premature ComplexesElectrocardiographyAnti-Arrhythmia AgentsDeath, Sudden, CardiacDefibrillators, ImplantableElectrocardiography, AmbulatoryCardiac Complexes, PrematureVentricular DysfunctionTachycardiaArrhythmia, SinusHeart VentriclesHeart Conduction SystemElectrophysiologic Techniques, CardiacLong QT SyndromeHeart RateDigitalis GlycosidesCardiac Pacing, ArtificialFlecainideAmiodaroneMyocardial InfarctionTetralogy of FallotArrhythmogenic Right Ventricular DysplasiaHeartMyocardial IschemiaElectric CountershockDogsCatheter AblationEncainideMexiletineMyocardiumTorsades de PointesDeath, SuddenCardiomyopathiesAction PotentialsFollow-Up StudiesPropafenoneSyncopeTachycardia, SupraventricularAconitineTime FactorsCardiomyopathy, DilatedNAV1.5 Voltage-Gated Sodium ChannelElectrophysiologyMyocardial Reperfusion InjuryAstemizoleAtrial FibrillationBrugada SyndromeMyocytes, CardiacProcainamideDisopyramideBody Surface Potential MappingDigitalisHeart BlockEchocardiographyAdrenergic beta-AntagonistsPericardiumBundle-Branch BlockMoricizineStroke VolumeHeart FailureHeart ArrestLidocaineTreatment OutcomeEther-A-Go-Go Potassium ChannelsAndersen SyndromeAtrial FlutterRisk FactorsTocainideSotalolVentricular Dysfunction, LeftVentricular Function, LeftModels, CardiovascularTelemetryVentricular SeptumQuinidineConnexin 43Epicardial MappingPredictive Value of TestsTerfenadineBradycardiaProspective StudiesEpinephrineExercise TestDisease Models, AnimalSignal Processing, Computer-AssistedPacemaker, ArtificialAtrioventricular BlockHeart AtriaJervell-Lange Nielsen SyndromeCalsequestrinRetrospective StudiesVentricular FunctionThioridazinePostoperative ComplicationsRefractory Period, ElectrophysiologicalPropanolaminesCoronary Disease