Heart Failure, DiastolicHeart FailureDiastoleCardiac Output, LowHeartHeart Failure, SystolicVentricular Dysfunction, LeftSystoleStroke VolumeRats, Inbred DahlEchocardiography, DopplerVentricular Function, LeftEchocardiographyHeart RateNatriuretic Peptide, BrainMyocardiumOxypurinolHeart VentriclesVentricular PressureHemodynamicsMyocardial ContractionFibrosisHypertrophy, Left VentricularAngiotensin II Type 1 Receptor BlockersAngiotensin-Converting Enzyme InhibitorsTetrazolesExercise TestHypertensionAcetophenonesHeart DiseasesTime FactorsCardiac CatheterizationHeart TransplantationCardiomyopathy, DilatedBlood PressurePrognosisRisk FactorsTreatment FailureBenzimidazolesChronic DiseaseBlood Flow VelocityAdrenergic beta-AntagonistsMitral ValveVentricular RemodelingMorbidityProspective StudiesHeart Defects, CongenitalTreatment OutcomeCardiotonic AgentsCardiac Pacing, ArtificialHeart Function TestsFollow-Up StudiesCardiomyopathiesCardiomegalyMyocardial InfarctionMyocytes, CardiacDiureticsHeart AtriaHeart-Assist DevicesHospitalizationFetal HeartPropanolaminesMyocardial IschemiaDisease Models, AnimalBiological MarkersHeart ValvesSeverity of Illness IndexRetrospective StudiesDogsPredictive Value of TestsExercise ToleranceDigoxinKidney Failure, ChronicAtrial Natriuretic FactorVentricular DysfunctionCarbazolesSympathetic Nervous System