Atrial FlutterAtrial FibrillationCatheter AblationHeart AtriaAnti-Arrhythmia AgentsElectric CountershockElectrocardiographyElectrophysiologic Techniques, CardiacPulmonary VeinsCardiac Pacing, ArtificialHeart Conduction SystemVentricular FibrillationPropafenoneAmiodaroneTricuspid ValveAnticoagulantsBody Surface Potential MappingWarfarinAtrial AppendageAtrial FunctionHeart BlockProcainamideRefractory Period, ElectrophysiologicalTreatment OutcomePericarditisFlecainideTachycardia, ParoxysmalAtrial Premature ComplexesAtrial Function, RightTachycardia, SupraventricularRecurrenceFollow-Up StudiesAtrial Function, LeftTachycardiaThromboembolismIncidenceElectrocardiography, AmbulatoryCryosurgeryDisopyramideTachycardia, Ectopic AtrialAtrioventricular NodeProspective StudiesSotalolSick Sinus SyndromeTime FactorsArrhythmias, CardiacEchocardiography, TransesophagealPacemaker, ArtificialStrokeRisk FactorsVena Cava, InferiorDogsHeart RateElectrophysiologyDigoxinRetrospective StudiesWolff-Parkinson-White SyndromeEmbolismPostoperative ComplicationsArrhythmia, SinusHeart DiseasesCoronary SinusEchocardiographyAtrial Septumbeta-AlanineCardiac Surgical ProceduresFluoroscopyCardiac CathetersInternational Normalized RatioChronic DiseaseRisk AssessmentHydrops FetalisSinoatrial NodeBundle of HisPredictive Value of TestsBepridilCardiac CatheterizationHemorrhageDefibrillators, ImplantableSurgery, Computer-AssistedMitral ValveTachycardia, Sinoatrial Nodal ReentryEquipment DesignTachycardia, VentricularChi-Square DistributionEndocardiumHeart FailureBradycardiaTachycardia, Atrioventricular Nodal ReentryAtrioventricular BlockAction PotentialsSulfonamidesHeart Valve DiseasesPericardiumButylscopolammonium BromideMultivariate AnalysisPrognosisAspirinFetal DiseasesDouble-Blind Method