Electrophysiologic Techniques, CardiacElectrophysiologyHeart Conduction SystemCardiac Pacing, ArtificialElectrocardiographyArrhythmias, CardiacWolff-Parkinson-White SyndromeMyocytes, CardiacTachycardia, SupraventricularPre-Excitation SyndromesAnti-Arrhythmia AgentsTachycardiaTachycardia, VentricularHeartDeath, Sudden, CardiacAtrioventricular NodeHeart AtriaVentricular FibrillationCatheter AblationCardiac OutputTachycardia, Atrioventricular Nodal ReentryRefractory Period, ElectrophysiologicalHeart VentriclesDogsProcainamideAmiodaroneAction PotentialsTachycardia, Sinoatrial Nodal ReentryElectrocardiography, AmbulatoryElectrodiagnosisSyncopeAtrial FibrillationCardiac Surgical ProceduresDeath, SuddenEpicardial MappingCardiac CatheterizationAtrial FunctionTachycardia, ParoxysmalHeart ArrestTachycardia, Ectopic AtrialCardiac ElectrophysiologyBody Surface Potential MappingSinoatrial NodeMyocardiumTime FactorsHeart DiseasesMyocardial ContractionBundle of HisPurkinje FibersPolyneuropathiesHeart RateSotalolFollow-Up StudiesNeural ConductionDefibrillators, ImplantableHeart BlockCardiac Complexes, PrematureElectric CountershockHeart FailureCardiomyopathiesBundle-Branch BlockQuinidineAtrial FlutterBrugada SyndromeVentricular DysfunctionUlnar NeuropathiesCardiomegalyCardiac TamponadeElectrocoagulationEnfluraneEndocardiumTreatment OutcomeMonitoring, PhysiologicHemodynamicsPericardiumMyocardial InfarctionBupivacaineRats, Sprague-DawleyEchocardiographyHalothaneLidocaineStroke VolumePulmonary VeinsVentricular FunctionDisease Models, AnimalElectroretinographyRecurrenceProspective StudiesPacemaker, ArtificialNAV1.5 Voltage-Gated Sodium ChannelPapillary MusclesArrhythmia, SinusChlorobutanolSodium ChannelsPredictive Value of TestsModels, CardiovascularIsofluraneMyocardial IschemiaVentricular Dysfunction, LeftIsoproterenol