Ventricular FibrillationMyocardial IschemiaAtrial FibrillationElectrocardiographyElectric CountershockIschemiaHeart ArrestAnti-Arrhythmia AgentsArrhythmias, CardiacCardiopulmonary ResuscitationMyocardial Reperfusion InjuryTachycardia, VentricularHeart Conduction SystemDefibrillatorsBrain IschemiaDefibrillators, ImplantableElectrophysiologic Techniques, CardiacCardiac Pacing, ArtificialDogsHeartMyocardiumDeath, Sudden, CardiacTime FactorsCatheter AblationMyocardial InfarctionHeart RateBody Surface Potential MappingAmiodaroneCardiac Complexes, PrematureBrugada SyndromeElectrocardiography, AmbulatoryCoronary CirculationHeart AtriaCoronary DiseaseRefractory Period, ElectrophysiologicalHeart VentriclesTachycardiaSwineResuscitationPericardiumMyocardial ReperfusionEndocardiumHemodynamicsDisease Models, AnimalTreatment OutcomePulmonary VeinsHeart MassageExercise TestReperfusion InjuryFollow-Up StudiesAction PotentialsProcainamidePerfusionProspective StudiesModels, CardiovascularFlecainideCardiotonic AgentsCoronary VesselsDeath, SuddenAngina PectorisRecurrenceOut-of-Hospital Cardiac ArrestMyocardial ContractionRisk FactorsAtrial FlutterIschemic Preconditioning, MyocardialWarfarinVentricular Function, LeftLidocaineAnticoagulantsHypothermia, InducedPredictive Value of TestsCoronary AngiographyBundle-Branch BlockVentricular Premature ComplexesBlood PressureEmergency Medical ServicesElectrophysiologyEpicardial MappingCoronary VasospasmEchocardiographyVoltage-Sensitive Dye ImagingRabbitsSotalolAdrenergic beta-AntagonistsAnesthesiaNAV1.5 Voltage-Gated Sodium ChannelSyncopeAtrial AppendagePacemaker, ArtificialMyocardial StunningDisopyramideSyndromeWolff-Parkinson-White SyndromeRats, Sprague-DawleyRetrospective StudiesMyocytes, CardiacFourier AnalysisPropafenoneSignal Processing, Computer-Assisted