Atrial FlutterCatheter AblationAtrial FibrillationElectrocardiographyHeart AtriaTricuspid ValvePropafenoneAnti-Arrhythmia AgentsPericarditisHeart BlockElectrophysiologic Techniques, CardiacProcainamideElectric CountershockHeart Conduction SystemCardiac Pacing, ArtificialBody Surface Potential MappingAtrial Function, RightTachycardia, SupraventricularVena Cava, InferiorDisopyramideFlecainideAtrial FunctionAmiodaroneTachycardiaRefractory Period, ElectrophysiologicalAtrial Premature ComplexesTachycardia, Ectopic AtrialTachycardia, ParoxysmalElectrophysiologyHydrops FetalisImpulse Control DisordersCryosurgeryPulmonary VeinsAtrioventricular NodeArrhythmias, CardiacRecurrenceCoronary SinusTreatment OutcomeFluoroscopyFollow-Up StudiesCardiac CathetersButylscopolammonium BromideAtrial Function, LeftSick Sinus SyndromeRetrospective StudiesTachycardia, Sinoatrial Nodal ReentryBundle of HisTime FactorsDogsFetal DiseasesEchocardiography, TransesophagealElectrocardiography, AmbulatoryVenae CavaeProspective StudiesEdrophoniumSotalolHeart DiseasesAction PotentialsAtrial AppendageDigoxinTachycardia, Atrioventricular Nodal ReentryArrhythmia, SinusDysgeusiaAtrial SeptumPostoperative ComplicationsPacemaker, ArtificialHeart Defects, CongenitalSulfonamidesSurgery, Computer-AssistedCardiac CatheterizationAzygos VeinEchocardiographyEquipment Design