Atrial FlutterAtrial FibrillationCatheter AblationElectrocardiographyTricuspid ValveAnti-Arrhythmia AgentsHeart AtriaElectric CountershockElectrophysiologic Techniques, CardiacPropafenonePericarditisHeart BlockProcainamideHeart Conduction SystemCardiac Pacing, ArtificialBody Surface Potential MappingVentricular FibrillationAtrial Function, RightTachycardia, SupraventricularAmiodaroneFlecainideDisopyramideAtrial FunctionRefractory Period, ElectrophysiologicalTachycardiaVena Cava, InferiorPulmonary VeinsAtrial Premature ComplexesTachycardia, ParoxysmalTachycardia, Ectopic AtrialCryosurgeryTreatment OutcomeRecurrenceArrhythmias, CardiacFollow-Up StudiesHydrops FetalisAtrioventricular NodeElectrophysiologyAtrial Function, LeftAtrial AppendageSick Sinus SyndromeCoronary SinusFluoroscopyElectrocardiography, AmbulatoryEchocardiography, TransesophagealSotalolCardiac CathetersProspective StudiesDogsAnticoagulantsTachycardia, Sinoatrial Nodal ReentryTime FactorsButylscopolammonium BromideHeart DiseasesPacemaker, ArtificialDigoxinFetal DiseasesBundle of HisVenae CavaeArrhythmia, SinusAtrial SeptumThromboembolismEdrophoniumPostoperative ComplicationsEchocardiographyHeart RateRetrospective StudiesTachycardia, Atrioventricular Nodal ReentryCardiac CatheterizationSurgery, Computer-AssistedSulfonamidesWolff-Parkinson-White SyndromeDysgeusiaEndocardiumCardiac Surgical ProceduresHeart Defects, CongenitalEquipment DesignAzygos VeinTachycardia, VentricularWarfarinHeart Septal Defects, AtrialRisk Factors