Tachycardia, SupraventricularTachycardiaTachycardia, ParoxysmalTachycardia, VentricularTachycardia, Atrioventricular Nodal ReentryTachycardia, SinusElectrocardiographyTachycardia, Ectopic AtrialUltrasonic Surgical ProceduresCatheter AblationMandibular FracturesTachycardia, Ectopic JunctionalAnti-Arrhythmia AgentsAtrioventricular NodeWolff-Parkinson-White SyndromeArrhythmias, CardiacHeart Conduction SystemParacoccidioidomycosisHistiocytosis, Langerhans-CellAtrial Premature ComplexesElectrophysiologic Techniques, CardiacCardiac Pacing, ArtificialParacoccidioidesBundle of HisHydrops FetalisFlecainideAtrial FlutterTachycardia, Sinoatrial Nodal ReentryElectrocardiography, AmbulatoryAmiodaroneDigoxinFollow-Up StudiesPostural Orthostatic Tachycardia SyndromeCardiac Complexes, PrematurePre-Excitation SyndromesRetrospective StudiesAccessory Atrioventricular BundleAtrial FibrillationHeart RateTachycardia, ReciprocatingFetal DiseasesBody Surface Potential MappingHeart AtriaDefibrillators, ImplantableVentricular FibrillationVentricular Premature ComplexesElectric CountershockSotalolHeart BlockElectrocoagulationProcainamideTreatment OutcomePrognosisAtrioventricular BlockSyncopePropafenoneVerapamilHeart VentriclesElectrophysiologyHeart Rate, FetalNeoplasm Recurrence, LocalSinoatrial NodeBreast NeoplasmsBundle-Branch BlockRecurrenceBradycardiaPacemaker, ArtificialAntazolineDeath, Sudden, CardiacTime FactorsEchocardiographyDisopyramideHydroxyzineHeart Defects, CongenitalFinancial AuditAdrenergic beta-AntagonistsCardiomyopathiesDogsAdenosineCardiomyopathy, DilatedCryosurgeryHeartTricuspid AtresiaInfant, NewbornCardiac Surgical ProceduresAtrial FunctionProspective StudiesEndocardiumFetal DistressCardiac CatheterizationHeterotaxy SyndromeHemodynamicsLavandulaRefractory Period, ElectrophysiologicalPostoperative ComplicationsArrhythmia, SinusEbstein AnomalySick Sinus SyndromeFluoroscopyPropanolamines