Atrial FibrillationIschemic Attack, TransientCatheter AblationHeart AtriaVentricular FibrillationAnti-Arrhythmia AgentsPulmonary VeinsStrokeElectric CountershockWarfarinAnticoagulantsAtrial FlutterElectrocardiographyAtrial AppendageElectrophysiologic Techniques, CardiacAmiodaroneCardiac Pacing, ArtificialTreatment OutcomeHeart Conduction SystemRecurrenceCerebrovascular DisordersFollow-Up StudiesRisk FactorsThromboembolismTime FactorsProspective StudiesRefractory Period, ElectrophysiologicalEmbolismAtrial FunctionTachycardia, ParoxysmalAtrial Function, LeftBrain IschemiaAtrial Premature ComplexesPropafenoneElectrocardiography, AmbulatoryBody Surface Potential MappingEchocardiography, Transesophagealbeta-AlanineSotalolFlecainideInternational Normalized RatioPacemaker, ArtificialAspirinRisk AssessmentAtrioventricular NodeRetrospective StudiesSick Sinus SyndromeIncidencePredictive Value of TestsHeart RateHemorrhageCryosurgeryCarotid StenosisWolff-Parkinson-White SyndromeArrhythmias, CardiacPostoperative ComplicationsCardiac Surgical ProceduresCerebral InfarctionBepridilHeart DiseasesTachycardiaChronic DiseasePlatelet Aggregation InhibitorsEchocardiographyDogsCohort StudiesTachycardia, Ectopic AtrialIntracranial EmbolismDigoxinCarotid Artery DiseasesAtrial Function, RightArrhythmia, SinusIntracranial Embolism and ThrombosisTachycardia, SupraventricularComorbidityFibrinolytic AgentsHeart Valve DiseasesHeart FailureAge FactorsEndarterectomy, CarotidSecondary PreventionAtrial SeptumSinoatrial NodePrognosisBradycardiaMitral ValveDefibrillators, ImplantableMultivariate AnalysisTomography, X-Ray ComputedPericardiumRiskChi-Square DistributionElectrophysiologyIntracranial HemorrhagesRegistriesProportional Hazards ModelsProcainamideAction PotentialsIntracranial ArteriosclerosisEndarterectomy