Heart Failure, DiastolicHeart FailureDiastoleCardiac Output, LowSystoleVentricular Dysfunction, LeftRats, Inbred DahlHeart Failure, SystolicEchocardiography, DopplerStroke VolumeVentricular Function, LeftHeartEchocardiographyOxypurinolNatriuretic Peptide, BrainMyocardiumHeart VentriclesVentricular PressureFibrosisHypertrophy, Left VentricularAngiotensin II Type 1 Receptor BlockersHeart RateAcetophenonesTetrazolesMyocardial ContractionHypertensionHemodynamicsAngiotensin-Converting Enzyme InhibitorsExercise TestCardiac CatheterizationBenzimidazolesBlood PressureBlood Flow VelocityMitral ValveMorbidityTime FactorsPrognosisRisk FactorsHeart DiseasesHeart TransplantationCardiomyopathy, DilatedProspective StudiesTreatment FailureChronic Disease