Atrial FibrillationAtrial FlutterWarfarinAtrial AppendageAnticoagulantsCatheter AblationHeart Atriabeta-AlanineThromboembolismAnti-Arrhythmia AgentsElectric CountershockPulmonary VeinsElectrocardiographyStrokeVentricular FibrillationAtrial Function, LeftEchocardiography, TransesophagealElectrophysiologic Techniques, CardiacInternational Normalized RatioEmbolismCardiac Pacing, ArtificialHeart Conduction SystemAmiodaroneTreatment OutcomePropafenoneRisk FactorsIntracranial HemorrhagesAtrial FunctionBody Surface Potential MappingHemorrhageRefractory Period, ElectrophysiologicalTachycardia, ParoxysmalAtrial Premature ComplexesIntracranial Embolism and ThrombosisThiophenesCerebrovascular DisordersBenzimidazolesProspective StudiesFlecainideFollow-Up StudiesRecurrenceTricuspid ValveAspirinFibrinolytic AgentsProcainamideElectrocardiography, AmbulatoryHeart BlockAtrial Function, RightTachycardia, SupraventricularAntithrombinsPericarditisSotalolAtrioventricular NodeTachycardiaCryosurgerySick Sinus SyndromePacemaker, ArtificialRisk AssessmentTachycardia, Ectopic AtrialTime FactorsArrhythmias, CardiacPredictive Value of TestsDisopyramideHeart RateWolff-Parkinson-White SyndromeMorpholinesEchocardiographyDigoxinDogsRetrospective StudiesArrhythmia, SinusChronic DiseaseIncidenceCardiac Surgical ProceduresAtrial SeptumElectrophysiologyHeart DiseasesPostoperative ComplicationsBepridilCoronary SinusSinoatrial NodePyridonesFluoroscopyVena Cava, InferiorCardiac CathetersDefibrillators, ImplantableMitral ValveHeart FailureBradycardiaHeart Valve DiseasesMultivariate AnalysisAdministration, OralTachycardia, VentricularBundle of HisPericardiumChi-Square DistributionAction PotentialsCardiac CatheterizationThrombosisSurgery, Computer-Assisted