Atrial FibrillationAtrial FlutterCatheter AblationHeart AtriaAnti-Arrhythmia AgentsElectric CountershockElectrocardiographyPulmonary VeinsVentricular FibrillationElectrophysiologic Techniques, CardiacCardiac Pacing, ArtificialHeart Conduction SystemAmiodaroneAtrial AppendageAnticoagulantsWarfarinPropafenoneAtrial FunctionBody Surface Potential MappingTachycardia, ParoxysmalAtrial Function, LeftTreatment OutcomeRefractory Period, ElectrophysiologicalFlecainideAtrial Premature ComplexesRecurrenceHeart BlockFollow-Up StudiesThromboembolismProcainamideTachycardia, SupraventricularSick Sinus SyndromeElectrocardiography, AmbulatoryTricuspid ValveAtrioventricular NodeAtrial Function, RightTachycardiaSotalolCircadian RhythmPacemaker, ArtificialArrhythmias, CardiacStrokeHeart RateCryosurgeryTachycardia, Ectopic AtrialProspective StudiesEchocardiography, TransesophagealTime FactorsPericarditisArrhythmia, SinusDigoxinCoronary SinusRisk FactorsDisopyramideWolff-Parkinson-White SyndromeSinoatrial NodeDogsbeta-AlanineBepridilEchocardiographyEmbolismElectrophysiologyCardiac Surgical ProceduresHeart DiseasesChronic DiseaseRetrospective StudiesInternational Normalized RatioPostoperative ComplicationsAtrial SeptumMitral ValveTachycardia, VentricularIncidenceBradycardiaRisk AssessmentHeart FailurePredictive Value of TestsBundle of HisDefibrillators, ImplantableFluoroscopyHemorrhageHeart Valve DiseasesVena Cava, InferiorCranial SinusesMaxillary SinusPericardiumCardiac CathetersEndocardiumAction PotentialsAtrioventricular BlockCardiac CatheterizationChi-Square DistributionParanasal SinusesTachycardia, Atrioventricular Nodal ReentryCardiac Complexes, PrematureAspirinMitral Valve StenosisSinus of ValsalvaAprindineEquipment DesignCavernous Sinus