Atrial FlutterCatheter AblationHeart Conduction SystemNeural ConductionAtrial FibrillationElectrocardiographyTricuspid ValveHeart BlockHeart AtriaElectrophysiologic Techniques, CardiacAnti-Arrhythmia AgentsPropafenonePericarditisCardiac Pacing, ArtificialProcainamideElectric CountershockBody Surface Potential MappingAtrioventricular NodeTachycardia, SupraventricularAtrial Function, RightRefractory Period, ElectrophysiologicalFlecainideDisopyramideAtrial FunctionVena Cava, InferiorTachycardiaAmiodaroneArrhythmias, CardiacElectrophysiologyTachycardia, ParoxysmalAtrial Premature ComplexesTachycardia, Ectopic AtrialCryosurgeryTreatment OutcomeFollow-Up StudiesPulmonary VeinsHydrops FetalisRecurrenceTime FactorsCoronary SinusSick Sinus SyndromeDogsFluoroscopyProspective StudiesTachycardia, Sinoatrial Nodal ReentryAction PotentialsAtrial Function, LeftTachycardia, Atrioventricular Nodal ReentryCardiac CathetersButylscopolammonium BromideElectrocardiography, AmbulatoryAtrioventricular BlockFetal DiseasesSotalolVenae CavaeHeart DiseasesWolff-Parkinson-White SyndromeEchocardiography, TransesophagealAtrial AppendageBundle of HisEdrophoniumHeart RateRetrospective StudiesArrhythmia, SinusDigoxinCardiac CatheterizationSinoatrial NodeEndocardiumAtrial SeptumPostoperative ComplicationsHeart Defects, CongenitalEchocardiographySulfonamidesBone ConductionDysgeusiaMedian NervePacemaker, ArtificialRisk FactorsSurgery, Computer-AssistedAzygos VeinElectrodesHeartElectric StimulationEquipment DesignTachycardia, VentricularHeart Septal Defects, Atrial