Atrial FibrillationCatheter AblationHeart AtriaAnti-Arrhythmia AgentsVentricular FibrillationPulmonary VeinsElectric CountershockCircadian RhythmWarfarinAtrial FlutterElectrocardiographyAnticoagulantsElectrophysiologic Techniques, CardiacAmiodaroneAtrial AppendageCardiac Pacing, ArtificialHeart Conduction SystemTreatment OutcomeThromboembolismAtrial Function, LeftAtrial FunctionTachycardia, ParoxysmalRefractory Period, ElectrophysiologicalStrokeRecurrenceAtrial Premature ComplexesFollow-Up StudiesElectrocardiography, AmbulatoryPropafenoneBody Surface Potential MappingSotalolPacemaker, ArtificialFlecainidebeta-AlanineRisk FactorsTime FactorsAtrioventricular NodeProspective StudiesHeart RateSick Sinus SyndromeInternational Normalized RatioEmbolismArrhythmias, CardiacEchocardiography, TransesophagealCryosurgeryWolff-Parkinson-White SyndromeBepridilDigoxinTachycardia, Ectopic AtrialArrhythmia, SinusTachycardia, SupraventricularTachycardiaChronic DiseaseCardiac Surgical ProceduresAtrial Function, RightDogsHemorrhageRisk AssessmentIncidenceEchocardiographySinoatrial NodeRetrospective StudiesHeart FailureAtrial SeptumBradycardiaDefibrillators, ImplantablePredictive Value of TestsPostoperative ComplicationsMitral ValveHeart DiseasesHeart Valve DiseasesAspirinProcainamidePericardiumElectrophysiologyHeart BlockAction PotentialsTachycardia, VentricularFibrinolytic AgentsCerebrovascular DisordersAtrial RemodelingModels, CardiovascularPyridonesChi-Square DistributionBenzimidazolesAdrenergic beta-AntagonistsCardiac Complexes, PrematurePeriodicityDisopyramideComorbidityMitral Valve StenosisMultivariate AnalysisHeart ArrestPrognosisAprindineAge FactorsCoronary Artery BypassCohort StudiesAutonomic DenervationRheumatic Heart Disease