Atrial FlutterCatheter AblationAtrial FibrillationTricuspid ValveElectrocardiographyPropafenonePericarditisAnti-Arrhythmia AgentsHeart AtriaHeart BlockElectrophysiologic Techniques, CardiacProcainamideElectric CountershockHeart Conduction SystemCardiac Pacing, ArtificialBody Surface Potential MappingAtrial Function, RightTachycardia, SupraventricularVena Cava, InferiorDisopyramideFlecainideAmiodaroneAtrial FunctionTachycardiaRefractory Period, ElectrophysiologicalAtrial Premature ComplexesTachycardia, Ectopic AtrialTachycardia, ParoxysmalHydrops FetalisCryosurgeryTreatment OutcomeFollow-Up StudiesRecurrencePulmonary VeinsElectrophysiologyFluoroscopyCoronary SinusArrhythmias, CardiacAtrioventricular NodeFetal DiseasesProspective StudiesCardiac CathetersSick Sinus SyndromeButylscopolammonium BromideAtrial Function, LeftTachycardia, Sinoatrial Nodal ReentryPrenatal DiagnosisRetrospective StudiesEchocardiography, TransesophagealTime FactorsElectrocardiography, AmbulatoryVenae CavaeDogsEdrophoniumSotalolHeart DiseasesBundle of HisSensitivity and SpecificityAtrial AppendageHeart Defects, CongenitalDigoxinPostoperative ComplicationsTachycardia, Atrioventricular Nodal ReentryEchocardiographyAtrial SeptumDysgeusiaCardiac CatheterizationSulfonamidesArrhythmia, SinusSurgery, Computer-AssistedAzygos VeinDelayed DiagnosisPacemaker, ArtificialEquipment DesignEarly Diagnosis