Heart Failure, DiastolicHeart FailureDiastoleHeartCardiac Output, LowSystoleVentricular Dysfunction, LeftRats, Inbred DahlHeart Failure, SystolicEchocardiography, DopplerStroke VolumeVentricular Function, LeftEchocardiographyHeart RateOxypurinolNatriuretic Peptide, BrainMyocardiumVentricular PressureHeart VentriclesFibrosisHypertrophy, Left VentricularAngiotensin II Type 1 Receptor BlockersMyocardial ContractionHemodynamicsTetrazolesAcetophenonesHypertensionExercise TestAngiotensin-Converting Enzyme InhibitorsCardiac CatheterizationHeart DiseasesBenzimidazolesHeart TransplantationBlood Flow VelocityBlood PressureTime FactorsMitral ValveMorbidityRisk FactorsHeart Defects, CongenitalPrognosisCardiomyopathy, DilatedFetal HeartProspective StudiesChronic DiseaseHeart AtriaAdrenergic beta-AntagonistsVentricular RemodelingHeart Function TestsHeart ValvesTreatment FailureCardiotonic AgentsTreatment Outcome