Ventricular FibrillationMyocardial IschemiaAtrial FibrillationElectrocardiographyArrhythmias, CardiacMyocardial Reperfusion InjuryAnti-Arrhythmia AgentsElectric CountershockDogsIschemiaMyocardiumHeart Conduction SystemCoronary DiseaseMyocardial InfarctionHeart ArrestAcute DiseaseCoronary CirculationHeartHeart RateCreatine KinaseCardiopulmonary ResuscitationHemodynamicsTime FactorsMyocardial ReperfusionTachycardia, VentricularHeart VentriclesSwineDefibrillatorsVentricular Function, LeftCardiotonic AgentsBrain IschemiaDisease Models, AnimalDefibrillators, ImplantableElectrophysiologic Techniques, CardiacCardiac Pacing, ArtificialCoronary VesselsAngina PectorisMyocardial ContractionDeath, Sudden, CardiacAction PotentialsCatheter AblationBody Surface Potential MappingAmiodaroneCardiac Complexes, PrematureBrugada SyndromeBlood PressureElectrocardiography, AmbulatoryRats, Sprague-DawleyHeart AtriaRefractory Period, ElectrophysiologicalTachycardiaResuscitationPericardiumEndocardiumTreatment OutcomePulmonary VeinsHeart MassageExercise TestReperfusion InjuryFollow-Up StudiesProcainamidePerfusionProspective StudiesModels, CardiovascularFlecainideDeath, SuddenRecurrenceOut-of-Hospital Cardiac ArrestRisk FactorsAtrial FlutterIschemic Preconditioning, MyocardialWarfarinLidocaineAnticoagulantsHypothermia, InducedPredictive Value of TestsCoronary AngiographyBundle-Branch BlockVentricular Premature ComplexesEmergency Medical ServicesElectrophysiologyEpicardial MappingCoronary VasospasmEchocardiographyVoltage-Sensitive Dye ImagingRabbitsSotalolAdrenergic beta-AntagonistsAnesthesiaNAV1.5 Voltage-Gated Sodium ChannelSyncopeAtrial AppendagePacemaker, ArtificialMyocardial StunningDisopyramideSyndromeWolff-Parkinson-White SyndromeRetrospective StudiesMyocytes, CardiacFourier Analysis