Atrial FibrillationAtrial FlutterCatheter AblationHeart AtriaAnti-Arrhythmia AgentsElectric CountershockPulmonary VeinsElectrocardiographyVentricular FibrillationElectrophysiologic Techniques, CardiacCardiac Pacing, ArtificialHeart Conduction SystemAmiodaroneAnticoagulantsWarfarinAtrial AppendagePropafenoneTreatment OutcomeAtrial FunctionBody Surface Potential MappingRefractory Period, ElectrophysiologicalTachycardia, ParoxysmalAtrial Premature ComplexesFlecainideAtrial Function, LeftRecurrenceFollow-Up StudiesThromboembolismTricuspid ValveProcainamideElectrocardiography, AmbulatoryHeart BlockAtrial Function, RightStrokeTachycardia, SupraventricularPericarditisSotalolAtrioventricular NodeTachycardiaProspective StudiesCryosurgerySick Sinus SyndromePacemaker, ArtificialTime FactorsTachycardia, Ectopic AtrialRisk FactorsEchocardiography, TransesophagealArrhythmias, CardiacDisopyramidebeta-AlanineHeart RateEmbolismWolff-Parkinson-White SyndromeDigoxinDogsInternational Normalized RatioRetrospective StudiesArrhythmia, SinusCardiac Surgical ProceduresEchocardiographyPostoperative ComplicationsAtrial SeptumHeart DiseasesElectrophysiologyChronic DiseaseIncidenceRisk AssessmentBepridilHemorrhageCoronary SinusSinoatrial NodePredictive Value of TestsFluoroscopyVena Cava, InferiorDefibrillators, ImplantableCardiac CathetersHeart FailureMitral ValveBradycardiaHeart Valve DiseasesTachycardia, VentricularPericardiumBundle of HisAspirinChi-Square DistributionCardiac CatheterizationAction PotentialsSurgery, Computer-AssistedEquipment DesignEndocardiumFibrinolytic AgentsMultivariate AnalysisPrognosisCerebrovascular DisordersAtrial RemodelingAtrioventricular BlockAdministration, OralModels, CardiovascularPyridonesAdrenergic beta-Antagonists