Tachycardia, VentricularElectrophysiologic Techniques, CardiacTachycardiaElectrocardiographyTachycardia, SupraventricularCatheter AblationHeart Conduction SystemArrhythmias, CardiacCardiac Pacing, ArtificialAnti-Arrhythmia AgentsVentricular FibrillationTachycardia, Atrioventricular Nodal ReentryTachycardia, ParoxysmalBody Surface Potential MappingElectrophysiologyTachycardia, SinusDefibrillators, ImplantableDeath, Sudden, CardiacTachycardia, Ectopic AtrialVentricular Premature ComplexesAmiodaroneElectrocardiography, AmbulatoryEpicardial MappingHeart VentriclesWolff-Parkinson-White SyndromeProcainamideEndocardiumCardiac Complexes, PrematureSyncopeBundle-Branch BlockAtrioventricular NodeElectric CountershockPre-Excitation SyndromesBundle of HisHeartMyocytes, CardiacFlecainideTachycardia, Sinoatrial Nodal ReentryCardiomyopathiesHeart RateSotalolFollow-Up StudiesDeath, SuddenPericardiumDogsHeart AtriaArrhythmogenic Right Ventricular DysplasiaRefractory Period, ElectrophysiologicalTachycardia, Ectopic JunctionalMyocardial InfarctionHeart ArrestTreatment OutcomeHeart BlockCryosurgeryCardiac ElectrophysiologyMexiletineAction PotentialsTime FactorsBrugada SyndromePurkinje FibersRecurrencePostural Orthostatic Tachycardia SyndromeCalsequestrinAtrial FibrillationCardiac CatheterizationAtrial FlutterLong QT SyndromeTachycardia, ReciprocatingEchocardiographyMyocardiumPropafenoneVentricular DysfunctionCicatrixNAV1.5 Voltage-Gated Sodium ChannelPacemaker, ArtificialCardiomyopathy, DilatedVerapamilStroke VolumeSignal Processing, Computer-AssistedProspective StudiesCardiac Surgical ProceduresCardiac OutputHeart DiseasesRyanodine Receptor Calcium Release ChannelSinoatrial NodePredictive Value of TestsMyocardial IschemiaTorsades de PointesAdrenergic beta-AntagonistsVentricular Dysfunction, LeftRetrospective StudiesDisopyramideBradycardiaCardiomyopathy, HypertrophicElectrodiagnosisHemodynamicsAccelerated Idioventricular RhythmHeart FailureCardiac Imaging TechniquesQuinidine