Atrial FlutterCatheter AblationAtrial FibrillationTricuspid ValveElectrocardiographyHeart AtriaPropafenoneAnti-Arrhythmia AgentsPericarditisElectrophysiologic Techniques, CardiacHeart BlockProcainamideElectric CountershockCardiac Pacing, ArtificialHeart Conduction SystemBody Surface Potential MappingAtrial Function, RightTachycardia, SupraventricularVena Cava, InferiorDisopyramideFlecainideAtrial FunctionAmiodaroneTachycardiaRefractory Period, ElectrophysiologicalAtrial Premature ComplexesTachycardia, Ectopic AtrialTachycardia, ParoxysmalAtrial Function, LeftHydrops FetalisCryosurgeryPulmonary VeinsTreatment OutcomeElectrophysiologyFollow-Up StudiesRecurrenceArrhythmias, CardiacCoronary SinusFluoroscopyAtrioventricular NodeCardiac CathetersDogsEchocardiography, TransesophagealButylscopolammonium BromideSick Sinus SyndromeTachycardia, Sinoatrial Nodal ReentryTime FactorsProspective StudiesEchocardiographyVentricular Function, LeftFetal DiseasesElectrocardiography, AmbulatoryVenae CavaeHeart DiseasesBundle of HisSotalolEdrophoniumAtrial AppendageVentricular Dysfunction, LeftCardiac CatheterizationDigoxinPostoperative ComplicationsHeart Defects, CongenitalAtrial SeptumRetrospective StudiesTachycardia, Atrioventricular Nodal ReentryPacemaker, ArtificialDysgeusiaSulfonamidesSurgery, Computer-AssistedAzygos VeinArrhythmia, SinusEndocardiumHeart RateEquipment DesignHeart Septal Defects, Atrial