Atrial FibrillationVentricular FibrillationElectric CountershockAnti-Arrhythmia AgentsElectrocardiographyCatheter AblationHeart AtriaPulmonary VeinsElectrophysiologic Techniques, CardiacHeart Conduction SystemCardiac Pacing, ArtificialHeart ArrestArrhythmias, CardiacAmiodaroneWarfarinAtrial FlutterAnticoagulantsCardiopulmonary ResuscitationTachycardia, VentricularAtrial AppendageRefractory Period, ElectrophysiologicalBody Surface Potential MappingDefibrillators, ImplantableTreatment OutcomeDefibrillatorsDeath, Sudden, CardiacTime FactorsHeart RateDogsFollow-Up StudiesElectrocardiography, AmbulatoryRecurrenceFlecainideTachycardiaHeartThromboembolismAtrial FunctionStrokeTachycardia, ParoxysmalAtrial Function, LeftProspective StudiesPacemaker, ArtificialPropafenoneCardiac Complexes, PrematureSotalolRisk FactorsBrugada SyndromePericardiumCardiac Surgical ProceduresMyocytes, CardiacAtrial Premature ComplexesHeart VentriclesWolff-Parkinson-White SyndromeProcainamideResuscitationbeta-AlanineSick Sinus SyndromeHeart DiseasesModels, CardiovascularAtrioventricular NodeAction PotentialsEndocardiumEmbolismInternational Normalized RatioHeart FailureEchocardiography, TransesophagealMyocardial InfarctionRetrospective StudiesEchocardiographyRisk AssessmentMyocardial IschemiaPredictive Value of TestsHeart MassageTachycardia, SupraventricularCryosurgeryElectrophysiologyOut-of-Hospital Cardiac ArrestMyocardiumIncidenceSwineBepridilDisopyramideEpicardial MappingChronic DiseaseBradycardiaDigoxinDeath, SuddenPostoperative ComplicationsTachycardia, Ectopic AtrialHemorrhageArrhythmia, SinusCardiac OutputAtrial Function, RightLidocaineAdrenergic beta-AntagonistsVoltage-Sensitive Dye ImagingCardiac ElectrophysiologyHeart BlockDisease Models, AnimalNAV1.5 Voltage-Gated Sodium Channel