Atrial FlutterCatheter AblationAtrial FibrillationElectrocardiographyElectric CountershockAnti-Arrhythmia AgentsHeart AtriaCircadian RhythmTricuspid ValveElectrophysiologic Techniques, CardiacHeart Conduction SystemCardiac Pacing, ArtificialHeart BlockPropafenoneProcainamideBody Surface Potential MappingAmiodaronePericarditisTachycardia, SupraventricularAtrial Function, RightAtrial FunctionTachycardiaCoronary SinusFlecainideTachycardia, ParoxysmalAtrial Function, LeftPulmonary VeinsCranial SinusesMaxillary SinusDisopyramideSick Sinus SyndromeAtrial Premature ComplexesTachycardia, Ectopic AtrialAtrioventricular NodeVena Cava, InferiorRefractory Period, ElectrophysiologicalParanasal SinusesArrhythmias, CardiacTreatment OutcomeRecurrenceSinus of ValsalvaCavernous SinusAtrial AppendageArrhythmia, SinusCryosurgeryHeart RateFollow-Up StudiesElectrophysiologyCarotid SinusSinoatrial NodeEchocardiography, TransesophagealSotalolDigoxinHydrops FetalisElectrocardiography, AmbulatoryFrontal SinusParanasal Sinus DiseasesBundle of HisSphenoid SinusPacemaker, ArtificialTime FactorsProspective StudiesDogsFluoroscopyTachycardia, Atrioventricular Nodal ReentryTachycardia, VentricularHeart DiseasesTachycardia, Sinoatrial Nodal ReentryEchocardiographySinus Thrombosis, IntracranialFetal DiseasesEndocardiumCardiac CathetersTachycardia, SinusButylscopolammonium BromideEthmoid SinusWolff-Parkinson-White SyndromeDysgeusiaCardiac CatheterizationThromboembolismAtrioventricular BlockPostoperative ComplicationsRetrospective StudiesCardiac Surgical ProceduresVenae CavaeSulfonamidesMitral ValveAnticoagulantsEdrophoniumParanasal Sinus NeoplasmsBepridilHeart Defects, CongenitalEquipment DesignChronic DiseaseAtrial SeptumElectrodesHeart Septal Defects, AtrialEchocardiography, DopplerBradycardiaSurgery, Computer-Assisted