Atrial Function, LeftAtrial FibrillationAtrial FunctionHeart AtriaAtrial Function, RightElectric CountershockCatheter AblationVentricular FibrillationAnti-Arrhythmia AgentsPulmonary VeinsEchocardiography, DopplerWarfarinAtrial FlutterElectrocardiographyAnticoagulantsElectrophysiologic Techniques, CardiacAtrial AppendageAmiodaroneEchocardiographyCardiac Pacing, ArtificialEchocardiography, TransesophagealEchocardiography, Doppler, PulsedHeart Conduction SystemPericardiectomyVentricular Function, LeftMyocardial ContractionTreatment OutcomeThromboembolismStrokeHeart Function TestsRefractory Period, ElectrophysiologicalTachycardia, ParoxysmalStroke VolumeFollow-Up StudiesRecurrenceAtrial Premature ComplexesPropafenoneElectrocardiography, AmbulatoryBody Surface Potential MappingRisk FactorsSotalolbeta-AlaninePacemaker, ArtificialFlecainideVentricular FunctionProspective StudiesTime FactorsAtrioventricular NodeSick Sinus SyndromeInternational Normalized RatioEmbolismHemodynamicsHeart RateObserver VariationBlood Flow VelocityCryosurgeryWolff-Parkinson-White SyndromeArrhythmias, CardiacVentricular Dysfunction, LeftDogsBepridilTachycardiaCardiac Surgical ProceduresTachycardia, Ectopic AtrialChronic DiseaseDigoxinHemorrhageHeart FailureRisk AssessmentRetrospective StudiesIncidenceArrhythmia, SinusTachycardia, SupraventricularMitral ValveAtrial SeptumPredictive Value of TestsHeart DiseasesPostoperative ComplicationsSinoatrial NodeHeart Valve DiseasesDefibrillators, ImplantableBradycardiaPericardiumHeart VentriclesAspirinProcainamideFibrinolytic AgentsAtrial RemodelingCerebrovascular DisordersTachycardia, VentricularModels, CardiovascularHeart BlockElectrophysiologyAdrenergic beta-AntagonistsChi-Square DistributionPyridonesBenzimidazolesHypertrophy, Left VentricularDisopyramideAction Potentials