Atrial FibrillationArrhythmias, CardiacCatheter AblationAnti-Arrhythmia AgentsVentricular FibrillationHeart AtriaElectric CountershockPulmonary VeinsElectrocardiographyAtrial FlutterWarfarinElectrophysiologic Techniques, CardiacAnticoagulantsHeart Conduction SystemAmiodaroneCardiac Pacing, ArtificialAtrial AppendageArrhythmia, SinusTreatment OutcomeElectrocardiography, AmbulatoryRefractory Period, ElectrophysiologicalTachycardia, ParoxysmalAtrial FunctionThromboembolismAtrial Premature ComplexesStrokePropafenoneAtrial Function, LeftFollow-Up StudiesRecurrenceFlecainideBody Surface Potential MappingHeart RateSotalolTachycardiaPacemaker, ArtificialTachycardia, VentricularRisk FactorsTime FactorsProspective StudiesAtrioventricular Nodebeta-AlanineSick Sinus SyndromeTachycardia, SupraventricularWolff-Parkinson-White SyndromeInternational Normalized RatioEmbolismDogsCryosurgeryEchocardiography, TransesophagealDefibrillators, ImplantableTachycardia, Ectopic AtrialBepridilCardiac Surgical ProceduresDigoxinCardiac Complexes, PrematureBradycardiaEchocardiographyRisk AssessmentIncidenceRetrospective StudiesHeart FailureAtrial Function, RightChronic DiseaseHemorrhageSinoatrial NodeHeart DiseasesPostoperative ComplicationsPredictive Value of TestsPericardiumProcainamideDeath, Sudden, CardiacAction PotentialsHeart VentriclesAtrial SeptumModels, CardiovascularElectrophysiologyHeart BlockHeart Valve DiseasesVentricular Premature ComplexesMitral ValveDisopyramideHeartAdrenergic beta-AntagonistsAspirinDigitalis GlycosidesAtrial RemodelingFibrinolytic AgentsCerebrovascular DisordersChi-Square DistributionAprindineHeart ArrestPrognosisSignal Processing, Computer-AssistedComorbidityEpicardial MappingBenzimidazolesQuinidineStroke VolumeMyocardium