Atrial FlutterCatheter AblationTricuspid ValveElectrophysiologic Techniques, CardiacAtrial FibrillationElectrocardiographyHeart AtriaPropafenoneAnti-Arrhythmia AgentsPericarditisHeart BlockProcainamideElectric CountershockHeart Conduction SystemCardiac Pacing, ArtificialBody Surface Potential MappingTachycardia, SupraventricularAtrial Function, RightVena Cava, InferiorDisopyramideFlecainideTachycardiaAmiodaroneAtrial FunctionTachycardia, Ectopic AtrialRefractory Period, ElectrophysiologicalAtrial Premature ComplexesCryosurgeryPulmonary VeinsTachycardia, ParoxysmalHydrops FetalisTreatment OutcomeRecurrenceAtrioventricular NodeFluoroscopyFollow-Up StudiesCoronary SinusElectrophysiologyAtrial Function, LeftArrhythmias, CardiacCardiac CathetersAblation TechniquesTachycardia, Sinoatrial Nodal Reentry