Atrial FlutterAtrial FibrillationCatheter AblationHeart AtriaAnti-Arrhythmia AgentsElectric CountershockElectrocardiographyElectrophysiologic Techniques, CardiacPulmonary VeinsCardiac Pacing, ArtificialHeart Conduction SystemVentricular FibrillationPropafenoneAmiodaroneTricuspid ValveAnticoagulantsBody Surface Potential MappingIncidenceWarfarinAtrial AppendageAtrial FunctionHeart BlockProcainamideRefractory Period, ElectrophysiologicalPericarditisTreatment OutcomeFlecainideTachycardia, ParoxysmalAtrial Premature ComplexesAtrial Function, RightTachycardia, SupraventricularFollow-Up StudiesRecurrenceAtrial Function, LeftTachycardiaThromboembolismElectrocardiography, AmbulatoryCryosurgeryDisopyramideProspective StudiesTachycardia, Ectopic AtrialAtrioventricular NodeSotalolSick Sinus SyndromeTime FactorsArrhythmias, CardiacRisk FactorsEchocardiography, TransesophagealPacemaker, ArtificialStrokeVena Cava, InferiorDogsHeart RateElectrophysiologyRetrospective StudiesDigoxinWolff-Parkinson-White SyndromePostoperative ComplicationsEmbolismArrhythmia, SinusHeart DiseasesCoronary SinusAtrial SeptumEchocardiographybeta-AlanineCardiac Surgical ProceduresFluoroscopyCardiac CathetersInternational Normalized RatioRisk AssessmentChronic DiseaseHydrops FetalisSinoatrial NodeBundle of HisPredictive Value of TestsBepridilCardiac CatheterizationHemorrhageDefibrillators, ImplantableSurgery, Computer-AssistedMitral ValveTachycardia, Sinoatrial Nodal ReentryTachycardia, VentricularEquipment DesignChi-Square DistributionEndocardiumHeart FailureBradycardiaTachycardia, Atrioventricular Nodal ReentryAtrioventricular BlockAction PotentialsSulfonamidesHeart Valve DiseasesCohort StudiesPericardiumMultivariate AnalysisButylscopolammonium BromideAspirinDouble-Blind MethodPrognosis