Atrial FibrillationAtrial FlutterCatheter AblationIncidenceHeart AtriaAnti-Arrhythmia AgentsElectric CountershockPulmonary VeinsElectrocardiographyVentricular FibrillationElectrophysiologic Techniques, CardiacFollow-Up StudiesRisk FactorsProportional Hazards ModelsProspective StudiesCardiac Pacing, ArtificialHeart Conduction SystemAmiodaroneAnticoagulantsWarfarinAtrial AppendagePropafenoneAtrial FunctionTreatment OutcomeBody Surface Potential MappingRefractory Period, ElectrophysiologicalTachycardia, ParoxysmalAtrial Premature ComplexesFlecainideAtrial Function, LeftRecurrenceThromboembolismTricuspid ValveProcainamideElectrocardiography, AmbulatoryStrokeHeart BlockAtrial Function, RightTachycardia, SupraventricularPericarditisSotalolAtrioventricular NodeTime FactorsTachycardiaCryosurgerySick Sinus SyndromePacemaker, ArtificialTachycardia, Ectopic AtrialArrhythmias, CardiacEchocardiography, TransesophagealDisopyramidebeta-AlanineHeart RateEmbolismWolff-Parkinson-White SyndromeRetrospective StudiesDogsDigoxinInternational Normalized RatioArrhythmia, SinusCardiac Surgical ProceduresRisk AssessmentPostoperative ComplicationsEchocardiographyAtrial SeptumHeart DiseasesElectrophysiologyChronic DiseaseBepridilPredictive Value of TestsHemorrhageCoronary SinusSinoatrial NodeFluoroscopyHeart FailureVena Cava, InferiorDefibrillators, ImplantableCardiac CathetersMitral ValveCohort StudiesBradycardiaHeart Valve DiseasesChi-Square DistributionAspirinTachycardia, VentricularPericardiumBundle of HisMultivariate AnalysisCardiac CatheterizationAction PotentialsPrognosisSurgery, Computer-AssistedEquipment DesignCerebrovascular DisordersEndocardiumComorbidityFibrinolytic AgentsAtrial RemodelingAtrioventricular BlockAdministration, Oral