Cardiac ElectrophysiologyAtrial FibrillationHeart ArrestVentricular FibrillationCardiopulmonary ResuscitationElectrophysiologic Techniques, CardiacElectrophysiological ProcessesEpicardial MappingCatheter AblationModels, CardiovascularArrhythmias, CardiacHeart Conduction SystemElectrocardiographyHeartHeart AtriaElectrophysiologyAnti-Arrhythmia AgentsPulmonary VeinsElectric CountershockVoltage-Sensitive Dye ImagingElectrophysiological PhenomenaMyocytes, CardiacAtrioventricular NodeAction PotentialsAtrial FlutterWarfarinCardiac Pacing, ArtificialAnticoagulantsAmiodaroneAtrial AppendageHeart VentriclesHeart RateTreatment OutcomeComputer SimulationAtrial FunctionRefractory Period, ElectrophysiologicalLong QT SyndromeTachycardia, ParoxysmalThromboembolismStrokeMyocardiumAtrial Function, LeftBody Surface Potential MappingFollow-Up StudiesTime FactorsRecurrenceCardiac Surgical ProceduresElectrocardiography, AmbulatoryPacemaker, ArtificialAtrial Premature ComplexesPropafenoneRisk FactorsPotassium ChannelsProspective StudiesSotalolFlecainidebeta-AlanineDogsSick Sinus SyndromeHeart DiseasesWolff-Parkinson-White SyndromeEmbolismEchocardiography, TransesophagealInternational Normalized RatioAlgorithmsHeart FailureTachycardia, SupraventricularEchocardiographyTachycardiaDeath, Sudden, CardiacCryosurgeryTachycardia, Ectopic AtrialCardiac OutputRisk AssessmentRetrospective StudiesBepridilChronic DiseaseDigoxinSinoatrial NodePericardiumHemorrhageDefibrillators, ImplantableArrhythmia, SinusPredictive Value of TestsIncidenceAtrial Function, RightCardiac CatheterizationPostoperative ComplicationsBradycardiaHeart Valve DiseasesHeart BlockAtrial SeptumTachycardia, VentricularMitral ValveAspirinMyocardial ContractionAdrenergic beta-AntagonistsStroke VolumeProcainamideVentricular Dysfunction, Left