Heart FailureDiastoleHeart Failure, DiastolicVentricular Dysfunction, LeftHeartExercise TestEchocardiography, DopplerHeart RateExercise TherapyStroke VolumeVentricular DysfunctionVentricular Function, LeftExerciseEchocardiographySystoleHeart Failure, SystolicNatriuretic Peptide, BrainCardiac Output, LowMyocardiumHemodynamicsMyocardial ContractionCardiomyopathiesVentricular RemodelingHeart DiseasesEchocardiography, Doppler, PulsedTime FactorsHypertrophy, Left VentricularHeart VentriclesPhysical ExertionHeart Function TestsOxygen ConsumptionCardiomyopathy, DilatedBlood PressureProspective StudiesCardiomegalyChronic DiseaseTreatment OutcomeVentricular PressureMyocytes, CardiacVentricular Dysfunction, RightHeart TransplantationDisease Models, AnimalBiological MarkersRisk FactorsCardiotonic AgentsFibrosisCardiomyopathy, RestrictiveFollow-Up StudiesSarcoplasmic Reticulum Calcium-Transporting ATPasesHeart AtriaAdrenergic beta-AntagonistsHypertensionSeverity of Illness IndexPrognosisPredictive Value of TestsElectrocardiographyCardiomyopathy, HypertrophicMyocardial InfarctionMuscle, SkeletalTreatment FailureEndomyocardial FibrosisPhysical EnduranceCardiac Pacing, ArtificialEchocardiography, Doppler, ColorCase-Control StudiesMyocardial IschemiaAngiotensin-Converting Enzyme InhibitorsBlood Flow VelocityDogsErectile DysfunctionHeart Defects, CongenitalMitral ValveAnalysis of VarianceRetrospective StudiesAtrial Natriuretic FactorAtrial Function, LeftDyspneaRisk AssessmentCohort StudiesCardiac OutputSpironolactoneVentricular FunctionPulmonary Wedge PressureHospitalizationDisease ProgressionMineralocorticoid Receptor AntagonistsOxidative StressRats, Sprague-DawleyReference ValuesRats, WistarCardiac CatheterizationDouble-Blind MethodDiureticsAtrial FibrillationPropanolaminesKidney Failure, ChronicCardiovascular AgentsDiabetic CardiomyopathiesVascular ResistanceRest