Tachycardia, Atrioventricular Nodal ReentryCatheter AblationAtrioventricular NodeCryosurgeryTachycardia, SupraventricularBundle of HisHeart BlockElectrophysiologic Techniques, CardiacTachycardiaHeart Conduction SystemElectrocardiographyAtrioventricular BlockTachycardia, Ectopic JunctionalTachycardia, Sinoatrial Nodal ReentryTachycardia, ParoxysmalTachycardia, ReciprocatingMetaproterenolCardiac Pacing, ArtificialFluoroscopyTachycardia, SinusTachycardia, VentricularTreatment OutcomeElectrophysiologyFollow-Up StudiesRecurrenceHeart AtriaArrhythmias, CardiacAtrial FlutterAccessory Atrioventricular BundleAzygos VeinWolff-Parkinson-White SyndromeTachycardia, Ectopic AtrialRetrospective StudiesTime FactorsProspective StudiesPre-Excitation SyndromesBody Surface Potential MappingAnti-Arrhythmia AgentsAtrial FibrillationPre-Excitation, Mahaim-TypeCardiac ElectrophysiologyPulsed Radiofrequency TreatmentElectrocoagulationPostural Orthostatic Tachycardia SyndromeEncainide