Tachycardia, Ectopic AtrialTachycardiaTachycardia, SupraventricularCatheter AblationTachycardia, VentricularElectrophysiologic Techniques, CardiacTachycardia, ParoxysmalTachycardia, Atrioventricular Nodal ReentryHeart AtriaElectrocardiographyTachycardia, Sinoatrial Nodal ReentryTachycardia, SinusHeart Conduction SystemBody Surface Potential MappingAtrial FibrillationAtrial FlutterCardiac Pacing, ArtificialBundle of HisPulmonary VeinsAnti-Arrhythmia AgentsAtrioventricular NodeCoronary SinusAtrial Function, RightArrhythmias, CardiacTachycardia, Ectopic JunctionalCryosurgeryWolff-Parkinson-White SyndromeElectrocardiography, AmbulatoryFlecainideTreatment OutcomeStellate GanglionPostural Orthostatic Tachycardia SyndromeFollow-Up StudiesHeart BlockDogsTachycardia, ReciprocatingElectrophysiologyAtrial FunctionArrhythmia, SinusSinoatrial NodeAtrial Premature ComplexesRefractory Period, ElectrophysiologicalRecurrenceAmiodaroneHeart RateTime FactorsDefibrillators, ImplantablePacemaker, ArtificialAtrial AppendageBee VenomsFluoroscopyRetrospective StudiesVentricular FibrillationFontan ProcedureAminophyllineHeart Defects, CongenitalProspective StudiesPostoperative ComplicationsMitral ValveElectrodesPredictive Value of TestsCardiac Surgical ProceduresEchocardiographyHeartDisease Models, AnimalAdenosineVentricular Premature ComplexesReoperationProcainamideEndocardiumPre-Excitation SyndromesBundle-Branch BlockHeart VentriclesAccessory Atrioventricular BundleCardiac Complexes, PrematureAction PotentialsSyncope