Atrial FibrillationCatheter AblationHeart AtriaVentricular FibrillationAnti-Arrhythmia AgentsPulmonary VeinsElectric CountershockWarfarinAtrial FlutterAnticoagulantsElectrocardiographyElectrophysiologic Techniques, CardiacAtrial AppendageAmiodaroneCardiac Pacing, ArtificialHeart Conduction SystemTreatment OutcomePulseThromboembolismStrokeRefractory Period, ElectrophysiologicalAtrial FunctionTachycardia, ParoxysmalAtrial Function, LeftRecurrenceAtrial Premature ComplexesFollow-Up StudiesPropafenoneElectrocardiography, AmbulatoryBody Surface Potential Mappingbeta-AlanineSotalolRisk FactorsFlecainidePacemaker, ArtificialTime FactorsProspective StudiesAtrioventricular NodeSick Sinus SyndromeInternational Normalized RatioEmbolismHeart RateEchocardiography, TransesophagealCryosurgeryWolff-Parkinson-White SyndromeArrhythmias, CardiacBepridilTachycardiaTachycardia, Ectopic AtrialDigoxinHemorrhageDogsCardiac Surgical ProceduresChronic DiseaseAtrial Function, RightRisk AssessmentArrhythmia, SinusTachycardia, SupraventricularIncidenceEchocardiographyRetrospective StudiesAtrial SeptumHeart FailureSinoatrial NodePredictive Value of TestsPostoperative ComplicationsBradycardiaHeart Valve DiseasesDefibrillators, ImplantableHeart DiseasesMitral ValveAspirinPericardiumProcainamideElectrophysiologyAction PotentialsFibrinolytic AgentsCerebrovascular DisordersAtrial RemodelingModels, CardiovascularBenzimidazolesPyridonesHeart BlockDisopyramideTachycardia, VentricularChi-Square DistributionAdrenergic beta-AntagonistsComorbidityMultivariate AnalysisSignal Processing, Computer-AssistedCohort StudiesAprindinePrognosisMitral Valve StenosisAge FactorsCoronary Artery BypassAutonomic DenervationAdministration, OralVitamin KCardiac Complexes, Premature