Atrial FibrillationCatheter AblationHeart AtriaVentricular FibrillationAnti-Arrhythmia AgentsPulmonary VeinsElectric CountershockWarfarinElectrocardiographyAtrial FlutterAnticoagulantsCardiac Pacing, ArtificialElectrophysiologic Techniques, CardiacAtrial AppendageAmiodaroneHeart Conduction SystemTreatment OutcomeThromboembolismArrhythmias, CardiacAtrial FunctionStrokeMyocytes, CardiacRefractory Period, ElectrophysiologicalAtrial Function, LeftTachycardia, ParoxysmalFollow-Up StudiesCardiac Surgical ProceduresRecurrenceAtrial Premature ComplexesElectrocardiography, AmbulatoryPropafenoneTime FactorsRisk FactorsPacemaker, ArtificialBody Surface Potential MappingProspective StudiesHeart RateSotalolFlecainidebeta-AlanineAtrioventricular NodeSick Sinus SyndromeHeartEmbolismEchocardiography, TransesophagealInternational Normalized RatioHeart DiseasesEchocardiographyHeart FailureCryosurgeryWolff-Parkinson-White SyndromeDogsCardiac OutputDeath, Sudden, CardiacTachycardiaBepridilRisk AssessmentDigoxinRetrospective StudiesChronic DiseaseHemorrhageTachycardia, Ectopic AtrialArrhythmia, SinusIncidenceAtrial Function, RightPredictive Value of TestsTachycardia, SupraventricularPostoperative ComplicationsBradycardiaHeart Valve DiseasesSinoatrial NodeDefibrillators, ImplantableHeart ArrestHeart VentriclesAtrial SeptumPericardiumCardiac CatheterizationMitral ValveModels, CardiovascularAspirinMyocardiumStroke VolumeProcainamideElectrophysiologyHeart BlockTachycardia, VentricularAdrenergic beta-AntagonistsVentricular Dysfunction, LeftAction PotentialsCerebrovascular DisordersFibrinolytic AgentsMyocardial ContractionCoronary Artery BypassChi-Square DistributionPrognosisPyridonesAtrial RemodelingBenzimidazolesMyocardial InfarctionMultivariate Analysis