Atrial FibrillationAtrial FlutterCatheter AblationHeart AtriaAnti-Arrhythmia AgentsElectric CountershockPulmonary VeinsElectrocardiographyVentricular FibrillationElectrophysiologic Techniques, CardiacCardiac Pacing, ArtificialHeart Conduction SystemIncidenceAmiodaroneAnticoagulantsWarfarinAtrial AppendagePropafenoneTreatment OutcomeAtrial FunctionBody Surface Potential MappingRefractory Period, ElectrophysiologicalTachycardia, ParoxysmalFollow-Up StudiesAtrial Premature ComplexesRecurrenceFlecainideAtrial Function, LeftThromboembolismTricuspid ValveProspective StudiesProcainamideElectrocardiography, AmbulatoryHeart BlockRisk FactorsStrokeAtrial Function, RightTime FactorsTachycardia, SupraventricularPericarditisSotalolAtrioventricular NodeTachycardiaCryosurgerySick Sinus SyndromePacemaker, ArtificialArrhythmias, CardiacTachycardia, Ectopic AtrialEchocardiography, TransesophagealRetrospective StudiesDisopyramidebeta-AlanineHeart RateEmbolismWolff-Parkinson-White SyndromeDogsDigoxinPostoperative ComplicationsInternational Normalized RatioArrhythmia, SinusCardiac Surgical ProceduresEchocardiographyHeart DiseasesRisk AssessmentAtrial SeptumElectrophysiologyChronic DiseaseBepridilHemorrhagePredictive Value of TestsCoronary SinusSinoatrial NodeFluoroscopyDefibrillators, ImplantableVena Cava, InferiorCardiac CathetersHeart FailureMitral ValveBradycardiaHeart Valve DiseasesCohort StudiesChi-Square DistributionTachycardia, VentricularAspirinPericardiumBundle of HisPrognosisMultivariate AnalysisCardiac CatheterizationAction PotentialsCerebrovascular DisordersSurgery, Computer-AssistedEquipment DesignEndocardiumPrevalenceFibrinolytic AgentsAdministration, OralComorbidityDouble-Blind MethodAtrioventricular Block