Atrial FlutterHeart Conduction SystemCatheter AblationAtrial FibrillationElectrocardiographyTricuspid ValveHeart AtriaAnti-Arrhythmia AgentsPropafenoneHeart BlockPericarditisElectrophysiologic Techniques, CardiacCardiac Pacing, ArtificialProcainamideElectric CountershockBody Surface Potential MappingAtrial Function, RightTachycardia, SupraventricularArrhythmias, CardiacVena Cava, InferiorDisopyramideFlecainideAtrial FunctionTachycardiaAmiodaroneMyocytes, CardiacRefractory Period, ElectrophysiologicalAtrial Premature ComplexesElectrophysiologyTachycardia, Ectopic AtrialTachycardia, ParoxysmalCardiac Surgical ProceduresHydrops FetalisHeartTreatment OutcomeCryosurgeryImpulse Control DisordersHeart DiseasesFollow-Up StudiesAtrioventricular NodeTime FactorsPulmonary VeinsCardiac OutputRecurrenceCoronary SinusCardiac CatheterizationDogsFluoroscopyProspective StudiesCardiac CathetersAtrial Function, LeftSick Sinus SyndromeBundle of HisButylscopolammonium BromideEchocardiographyEchocardiography, TransesophagealElectrocardiography, AmbulatoryTachycardia, Sinoatrial Nodal ReentryFetal DiseasesHeart Defects, CongenitalHeart RateAction PotentialsVenae CavaeSotalolPacemaker, ArtificialEdrophoniumPostoperative ComplicationsDeath, Sudden, CardiacDigoxinArrhythmia, SinusAtrial AppendageRetrospective StudiesTachycardia, Atrioventricular Nodal ReentryCardiac VolumeAtrial SeptumSulfonamidesEquipment DesignEndocardiumDysgeusiaHeart VentriclesHeart TransplantationMyocardiumSurgery, Computer-AssistedAzygos VeinCardiomyopathiesElectric StimulationHeart Septal Defects, Atrial