Atrial FlutterCatheter AblationHeart AtriaTricuspid ValveElectrophysiologic Techniques, CardiacAtrial FibrillationHeart Conduction SystemElectrocardiographyBody Surface Potential MappingAnti-Arrhythmia AgentsVena Cava, InferiorCardiac Pacing, ArtificialAtrial Function, RightVenae CavaeHeart BlockPericarditisPropafenoneAtrial FunctionElectric CountershockProcainamideTachycardia, SupraventricularElectrophysiologyTreatment OutcomeTachycardiaFollow-Up StudiesRecurrenceDisopyramideRefractory Period, ElectrophysiologicalFlecainidePulmonary VeinsAtrial Premature ComplexesTachycardia, Ectopic AtrialAmiodaroneTachycardia, ParoxysmalProspective StudiesAtrioventricular NodeCryosurgeryCoronary SinusFluoroscopyHydrops FetalisArrhythmias, CardiacEchocardiography, TransesophagealDogsAtrial Function, LeftBundle of HisSick Sinus SyndromeTachycardia, Sinoatrial Nodal ReentryCardiac CathetersTachycardia, Atrioventricular Nodal ReentryAblation TechniquesAtrial AppendageAtrial SeptumHeart DiseasesCardiac CatheterizationEchocardiographyElectrocardiography, AmbulatoryButylscopolammonium BromideTime FactorsPacemaker, ArtificialSinoatrial NodeHeart NeoplasmsFetal DiseasesHeart Defects, CongenitalAzygos VeinEndocardiumHeart RateHeart Septal Defects, AtrialSurgery, Computer-AssistedSotalolEdrophoniumPostoperative ComplicationsArrhythmia, SinusEquipment DesignCardiac Surgical ProceduresHeart SeptumVena Cava, SuperiorHeartWolff-Parkinson-White Syndrome