Atrial FlutterAtrial FibrillationCatheter AblationHeart AtriaElectric CountershockAnti-Arrhythmia AgentsElectrocardiographyChronic DiseasePulmonary VeinsCardiac Pacing, ArtificialPropafenoneAtrial AppendageElectrophysiologic Techniques, CardiacAmiodaroneHeart Conduction SystemWarfarinAtrial FunctionAnticoagulantsAtrial Function, LeftRefractory Period, ElectrophysiologicalVentricular FibrillationAtrioventricular NodeTachycardia, ParoxysmalTreatment OutcomeTricuspid ValveCryosurgeryRecurrenceDigoxinFollow-Up StudiesPacemaker, ArtificialSick Sinus SyndromeBody Surface Potential MappingSotalolElectrocardiography, AmbulatoryIncidenceArrhythmia, SinusThromboembolismHeart BlockProcainamidePericarditisHeart Valve DiseasesFlecainideAtrial Premature ComplexesEchocardiography, TransesophagealAtrial Function, RightTime FactorsProspective StudiesTachycardia, SupraventricularBundle of HisMitral ValveHeart RateTachycardiaStrokeRisk FactorsDisopyramideTachycardia, Ectopic AtrialRetrospective StudiesElectrophysiologyEchocardiographyArrhythmias, CardiacCardiac Surgical ProceduresDogsHeart DiseasesVena Cava, InferiorWolff-Parkinson-White SyndromeAction PotentialsPostoperative ComplicationsEmbolismHeart FailureCoronary SinusAtrial Septumbeta-AlaninePredictive Value of TestsFluoroscopyMitral Valve StenosisCardiac CathetersEchocardiography, DopplerInternational Normalized RatioRisk AssessmentHeart VentriclesThrombosisHydrops FetalisHeart Valve Prosthesis ImplantationSinoatrial NodeBepridilCardiac CatheterizationHemorrhageDefibrillators, ImplantableSurgery, Computer-AssistedTachycardia, Sinoatrial Nodal ReentryTachycardia, VentricularEquipment DesignChi-Square DistributionMitral Valve InsufficiencyEndocardiumBradycardiaTachycardia, Atrioventricular Nodal ReentryMyocardiumAtrioventricular BlockCombined Modality Therapy