Heart Failure, DiastolicAtrial FibrillationHeart FailureDiastoleCardiac Output, LowVentricular Dysfunction, LeftSystoleEchocardiography, DopplerRats, Inbred DahlStroke VolumeHeart Failure, SystolicHeart AtriaVentricular Function, LeftCatheter AblationHeartEchocardiographyAnti-Arrhythmia AgentsVentricular FibrillationPulmonary VeinsElectric CountershockOxypurinolNatriuretic Peptide, BrainWarfarinHeart RateElectrocardiographyMyocardiumAnticoagulantsAtrial FlutterCardiac Pacing, ArtificialHeart VentriclesElectrophysiologic Techniques, CardiacAmiodaroneFibrosisTreatment OutcomeAtrial AppendageRisk FactorsTime FactorsVentricular PressureAngiotensin II Type 1 Receptor BlockersHypertrophy, Left VentricularHeart Conduction SystemHypertensionMyocardial ContractionMitral ValveHemodynamicsTetrazolesBenzimidazolesFollow-Up StudiesProspective StudiesCardiac CatheterizationAngiotensin-Converting Enzyme InhibitorsAcetophenonesExercise TestThromboembolismStrokeAtrial Function, LeftAtrial FunctionPrognosisRefractory Period, ElectrophysiologicalChronic DiseaseHeart DiseasesBlood PressureTachycardia, ParoxysmalElectrocardiography, AmbulatoryRecurrenceBlood Flow VelocityPacemaker, ArtificialAtrial Premature ComplexesPropafenoneMorbidityBody Surface Potential MappingSotalolDigoxinFlecainideAdrenergic beta-AntagonistsAtrioventricular Nodebeta-AlanineDogsArrhythmias, CardiacRetrospective StudiesRisk AssessmentSick Sinus SyndromeEmbolismInternational Normalized RatioPredictive Value of TestsEchocardiography, TransesophagealTachycardiaIncidenceCardiomyopathy, DilatedCryosurgeryCardiac Surgical ProceduresTreatment FailureWolff-Parkinson-White SyndromeDefibrillators, ImplantableAtrial Function, RightBepridilHeart BlockHeart TransplantationHemorrhageTachycardia, Ectopic Atrial