Atrial FibrillationAtrial FlutterCatheter AblationHeart AtriaAnti-Arrhythmia AgentsCardiac Pacing, ArtificialElectric CountershockAtrioventricular NodePulmonary VeinsElectrocardiographyPacemaker, ArtificialAtrial AppendageVentricular FibrillationWarfarinTreatment OutcomeElectrophysiologic Techniques, CardiacAmiodaronePropafenoneChronic DiseaseFollow-Up StudiesHeart Conduction SystemAnticoagulantsCardiac Resynchronization Therapy DevicesHeart RateAtrial FunctionAtrial Function, LeftRefractory Period, ElectrophysiologicalTachycardia, ParoxysmalProspective StudiesRecurrenceElectrocardiography, AmbulatoryThromboembolismBody Surface Potential MappingHeart FailureSotalolSick Sinus SyndromeCryosurgeryAtrial Premature ComplexesDigoxinFlecainideTricuspid ValveStrokeArrhythmia, SinusEchocardiography, TransesophagealTime FactorsHeart Valve DiseasesProcainamideHeart BlockAtrial Function, RightTachycardia, SupraventricularPericarditisTachycardiaRisk FactorsMitral ValveStroke VolumeTachycardia, Ectopic AtrialBundle of HisArrhythmias, CardiacCardiac Surgical ProceduresDogsEchocardiographyDisopyramidebeta-AlanineRetrospective StudiesElectrophysiologyHeart DiseasesEmbolismWolff-Parkinson-White SyndromeInternational Normalized RatioAtrial SeptumPostoperative ComplicationsPredictive Value of TestsIncidenceBepridilAction PotentialsRisk AssessmentCoronary SinusSinoatrial NodeHemorrhageMitral Valve StenosisFluoroscopyVena Cava, InferiorCardiac CathetersDefibrillators, ImplantableEchocardiography, DopplerHeart VentriclesBradycardiaThrombosisTachycardia, VentricularPericardiumAspirinHeart Valve Prosthesis ImplantationChi-Square DistributionCardiac CatheterizationSurgery, Computer-AssistedEndocardiumEquipment DesignFibrinolytic AgentsAtrial RemodelingCerebrovascular Disorders