Atrial FlutterCatheter AblationHeart Conduction SystemNeural ConductionPrevalenceAtrial FibrillationElectrocardiographyTricuspid ValveHeart BlockHeart AtriaElectrophysiologic Techniques, CardiacAnti-Arrhythmia AgentsPropafenonePericarditisProcainamideCardiac Pacing, ArtificialElectric CountershockBody Surface Potential MappingTachycardia, SupraventricularAtrioventricular NodeAtrial Function, RightRefractory Period, ElectrophysiologicalDisopyramideFlecainideAtrial FunctionVena Cava, InferiorTachycardiaAmiodaroneTachycardia, ParoxysmalArrhythmias, CardiacElectrophysiologyAtrial Premature ComplexesTachycardia, Ectopic AtrialCryosurgeryPulmonary VeinsHydrops FetalisFollow-Up StudiesTreatment OutcomeRecurrenceCoronary SinusSick Sinus SyndromeDogsFluoroscopyTime FactorsProspective StudiesTachycardia, Sinoatrial Nodal ReentryAtrial Function, LeftTachycardia, Atrioventricular Nodal ReentryAction PotentialsCardiac CathetersButylscopolammonium BromideFetal DiseasesAtrioventricular BlockElectrocardiography, AmbulatoryRisk FactorsHeart DiseasesVenae CavaeSotalolEchocardiography, TransesophagealWolff-Parkinson-White SyndromeRetrospective StudiesAtrial AppendageEdrophoniumBundle of HisCardiac CatheterizationDigoxinArrhythmia, SinusAtrial SeptumEndocardiumHeart Defects, CongenitalSinoatrial NodeEchocardiographyPostoperative ComplicationsHeart RateBone ConductionSulfonamidesDysgeusiaMedian NerveCross-Sectional StudiesSurgery, Computer-AssistedAzygos VeinPacemaker, ArtificialEquipment DesignElectrodesHeart Septal Defects, AtrialHeartIncidenceTachycardia, Ventricular