Atrial FibrillationCatheter AblationPulmonary VeinsTachycardia, ParoxysmalHeart AtriaElectrophysiologic Techniques, CardiacAnti-Arrhythmia AgentsAtrial FlutterElectrocardiographyHeart Conduction SystemElectrocardiography, AmbulatoryBody Surface Potential MappingAtrial Premature ComplexesCardiac Pacing, ArtificialCryosurgeryTachycardia, Ectopic AtrialTachycardia, SupraventricularTreatment OutcomeCatheters, IndwellingElectric CountershockWolff-Parkinson-White SyndromeRecurrenceAtrioventricular NodeSick Sinus SyndromeVentricular FibrillationAmiodaroneAtrial Function, LeftFollow-Up StudiesWarfarinAnticoagulantsPacemaker, ArtificialFlecainideCathetersAtrial SeptumTachycardiaTachycardia, VentricularAtrial FunctionTachycardia, Atrioventricular Nodal ReentryAtrial AppendageTime FactorsThromboembolismProspective StudiesPropafenoneSotalolRefractory Period, ElectrophysiologicalAtrial Function, RightArrhythmias, CardiacVena Cava, SuperiorHeart RateStrokeCatheterizationFluoroscopySinoatrial NodeCardiac CathetersRetrospective StudiesEchocardiography, TransesophagealArrhythmia, SinusEchocardiographyBepridilAblation TechniquesCardiac Complexes, PrematureHeart SeptumRisk FactorsVentricular Premature ComplexesEquipment DesignElectrophysiologyPredictive Value of TestsSurgery, Computer-AssistedBradycardiaEpicardial MappingPostoperative ComplicationsFeasibility StudiesCardiac CatheterizationAccessory Atrioventricular BundlePericardiumTachycardia, Sinoatrial Nodal ReentryRisk Assessmentbeta-AlanineAutonomic Nervous SystemDogsBundle of HisStellate GanglionTachycardia, ReciprocatingDisopyramideElectrocoagulationPulmonary Veno-Occlusive DiseaseChronic DiseaseHeart BlockIncidenceSinus Arrest, CardiacEndocardiumCoronary SinusTricuspid ValveVagus NerveCardiac Surgical ProceduresChi-Square DistributionAdrenergic beta-AntagonistsSignal Processing, Computer-AssistedEmbolismKaplan-Meier Estimate