Ventricular FibrillationAtrial FibrillationTachycardiaTachycardia, VentricularElectrocardiographyElectric CountershockTachycardia, SupraventricularAnti-Arrhythmia AgentsHeart ArrestCatheter AblationHeart Conduction SystemArrhythmias, CardiacCardiopulmonary ResuscitationElectrophysiologic Techniques, CardiacTachycardia, ParoxysmalCardiac Pacing, ArtificialTachycardia, Atrioventricular Nodal ReentryTachycardia, Ectopic AtrialDefibrillators, ImplantableDefibrillatorsTachycardia, SinusBody Surface Potential MappingAmiodaroneDeath, Sudden, CardiacHeart AtriaCardiac Complexes, PrematureHeart RateBrugada SyndromeDogsRefractory Period, ElectrophysiologicalProcainamideFlecainideHeart VentriclesEndocardiumTachycardia, Ectopic JunctionalResuscitationElectrocardiography, AmbulatoryTime FactorsPericardiumTreatment OutcomeWolff-Parkinson-White SyndromeAtrial FlutterPulmonary VeinsHeartVentricular Premature ComplexesPostural Orthostatic Tachycardia SyndromeAtrioventricular NodeBundle-Branch BlockFollow-Up StudiesTachycardia, ReciprocatingHeart MassageEpicardial MappingRecurrenceTachycardia, Sinoatrial Nodal ReentryDeath, SuddenSwineSyncopeMyocardial IschemiaMyocardial InfarctionAction PotentialsSotalolElectrophysiologyOut-of-Hospital Cardiac ArrestPacemaker, ArtificialModels, CardiovascularProspective StudiesLidocainePropafenoneWarfarinBundle of HisNAV1.5 Voltage-Gated Sodium ChannelHeart BlockDisopyramideVoltage-Sensitive Dye ImagingAnticoagulantsEmergency Medical ServicesAtrial AppendageCryosurgeryCardiac ElectrophysiologyMyocardiumRisk FactorsHypothermia, InducedRetrospective StudiesMyocardial Reperfusion InjuryHemodynamicsSignal Processing, Computer-AssistedAdrenergic beta-AntagonistsSyndromeDisease Models, AnimalPurkinje FibersFourier AnalysisElectric InjuriesPredictive Value of TestsPerfusionDigitalis GlycosidesCardiomyopathiesBradycardiaLong QT SyndromeHypokalemiaAtrial Function