Atrial FibrillationElectric CountershockCatheter AblationAnti-Arrhythmia AgentsBepridilPulmonary VeinsHeart AtriaElectrophysiologic Techniques, CardiacAmiodaroneElectrocardiographyAtrial AppendageSotalolAprindineRecurrenceTreatment OutcomeAnticoagulantsWarfarinHeart Conduction SystemVentricular FibrillationCardiac Pacing, ArtificialAtrial Function, LeftBody Surface Potential MappingAtrial FunctionFollow-Up StudiesAtrial SeptumFlecainideElectrocardiography, AmbulatoryAtrial FlutterCryosurgeryThromboembolismTime FactorsHeart RateProspective StudiesChronic DiseaseSinoatrial NodeEchocardiography, TransesophagealRisk FactorsStrokeRefractory Period, ElectrophysiologicalTachycardia, ParoxysmalPredictive Value of TestsAtrial Premature ComplexesRetrospective StudiesPropafenoneReoperationHeart Failurebeta-AlaninePacemaker, ArtificialChi-Square DistributionDouble-Blind MethodAtrioventricular NodeSick Sinus SyndromeInternational Normalized RatioEmbolismWolff-Parkinson-White SyndromeArrhythmias, CardiacTachycardiaTachycardia, Ectopic AtrialDigoxinHemorrhageCardiac Surgical ProceduresAtrial Function, RightDogsRisk AssessmentArrhythmia, SinusTachycardia, SupraventricularIncidenceSensitivity and SpecificityEchocardiographyPostoperative ComplicationsHeart Valve DiseasesBradycardiaDefibrillators, ImplantableHeart DiseasesMitral ValveReproducibility of ResultsAspirinPericardiumProcainamideFibrinolytic AgentsAtrial RemodelingCerebrovascular DisordersElectrophysiologyPyridonesBenzimidazolesHeart BlockTachycardia, VentricularDisopyramideModels, CardiovascularAdrenergic beta-AntagonistsComorbidityAction PotentialsMultivariate AnalysisMitral Valve StenosisCoronary Artery BypassPrognosisAutonomic DenervationCohort StudiesVitamin KAge Factors