Atrial FlutterCatheter AblationTricuspid ValveHeart Conduction SystemElectrophysiologic Techniques, CardiacAtrial FibrillationElectrocardiographyHeart AtriaBody Surface Potential MappingAnti-Arrhythmia AgentsCardiac Pacing, ArtificialVena Cava, InferiorHeart BlockVenae CavaePropafenonePericarditisProcainamideNeural ConductionElectric CountershockAtrial Function, RightTachycardia, SupraventricularElectrophysiologyDisopyramideFlecainideAtrial FunctionTreatment OutcomeRecurrenceRefractory Period, ElectrophysiologicalTachycardiaFollow-Up StudiesAmiodaroneAtrioventricular NodeAtrial Premature ComplexesTachycardia, ParoxysmalProspective StudiesTachycardia, Ectopic AtrialArrhythmias, CardiacCryosurgeryHydrops FetalisPulmonary VeinsCoronary SinusFluoroscopySick Sinus SyndromeTachycardia, Sinoatrial Nodal ReentryAtrial Function, LeftCardiac CathetersButylscopolammonium BromideDogsFetal DiseasesElectrocardiography, AmbulatoryEchocardiography, TransesophagealSotalolTachycardia, Atrioventricular Nodal ReentryTime FactorsEdrophoniumHeart DiseasesBundle of HisAtrial AppendageDigoxin