Ventricular FibrillationAtrial FibrillationElectric CountershockHeart ArrestElectrocardiographyAnti-Arrhythmia AgentsCardiopulmonary ResuscitationArrhythmias, CardiacTachycardia, VentricularDefibrillatorsHeart Conduction SystemDefibrillators, ImplantableElectrophysiologic Techniques, CardiacCardiac Pacing, ArtificialCatheter AblationAmiodaroneDeath, Sudden, CardiacBody Surface Potential MappingBrugada SyndromeCardiac Complexes, PrematureHeart AtriaDogsResuscitationRefractory Period, ElectrophysiologicalTachycardiaPulmonary VeinsHeart MassageTime FactorsPericardiumHeart RateHeart VentriclesProcainamideEndocardiumSwineHeartTreatment OutcomeFlecainideOut-of-Hospital Cardiac ArrestMyocardial IschemiaAction PotentialsDeath, SuddenAtrial FlutterElectrocardiography, AmbulatoryWarfarinFollow-Up StudiesModels, CardiovascularMyocardial InfarctionRecurrenceAnticoagulantsBundle-Branch BlockLidocaineEpicardial MappingEmergency Medical ServicesVentricular Premature ComplexesSotalolVoltage-Sensitive Dye ImagingProspective StudiesNAV1.5 Voltage-Gated Sodium ChannelAtrial AppendageSyncopePacemaker, ArtificialDisopyramideHypothermia, InducedWolff-Parkinson-White SyndromeMyocardial Reperfusion InjuryElectrophysiologyPropafenoneRisk FactorsFourier AnalysisElectric InjuriesMyocardiumPerfusionDisease Models, AnimalSyndromeSignal Processing, Computer-AssistedHypokalemiaPurkinje FibersCommotio CordisPredictive Value of TestsCardiac ElectrophysiologyRetrospective StudiesVagus Nerve StimulationTachycardia, SupraventricularCoronary VasospasmThromboembolismEquipment FailureDigitalis GlycosidesHemodynamicsBretylium CompoundsHeart DiseasesTachycardia, ParoxysmalAtrial FunctionStrokeSick Sinus SyndromeAtrial Function, LeftVentricular FunctionElectrodesAdrenergic beta-AntagonistsSurvival RateQuinidine