Stroke VolumeHeart FailureHeartHeart RateVentricular Function, LeftCardiac Output, LowHeart Failure, SystolicVentricular Dysfunction, LeftHeart Failure, DiastolicCardiomyopathy, DilatedEchocardiographyMyocardiumHeart DiseasesNatriuretic Peptide, BrainHemodynamicsVentricular RemodelingHeart TransplantationMyocardial ContractionChronic DiseaseTreatment OutcomeMilk EjectionAdrenergic beta-AntagonistsMyocardial InfarctionSystoleTime FactorsHeart Function TestsFollow-Up StudiesTreatment FailureHeart VentriclesCardiotonic AgentsProspective StudiesCardiac Pacing, ArtificialCardiomyopathiesPrognosisDiastoleEchocardiography, DopplerHeart Defects, CongenitalExercise TestRisk FactorsPredictive Value of TestsMyocardial IschemiaCardiomegalyAngiotensin-Converting Enzyme InhibitorsHeart AtriaDiureticsMyocytes, CardiacPropanolaminesHospitalizationSeverity of Illness IndexExercise ToleranceRetrospective StudiesElectrocardiographyHeart-Assist DevicesBiological MarkersFetal HeartVentricular DysfunctionVentricular PressureDisease Models, AnimalDogsGated Blood-Pool ImagingCarbazolesRisk AssessmentDigoxinCardiac VolumeHeart ValvesOxygen ConsumptionCardiac OutputBlood PressureAtrial Natriuretic FactorPulmonary Wedge PressureProportional Hazards ModelsRadionuclide VentriculographyCardiac Resynchronization TherapyCoronary DiseaseSurvival AnalysisKidney Failure, ChronicSurvival RateVentricular Function, RightHypertrophy, Left VentricularDeath, Sudden, CardiacSympathetic Nervous SystemCardiovascular AgentsDouble-Blind MethodMetoprololPacemaker, ArtificialPatient ReadmissionMitral Valve InsufficiencyCardiac CatheterizationDefibrillators, ImplantableArrhythmias, CardiacCohort StudiesMineralocorticoid Receptor AntagonistsHeart BlockAtrial FibrillationKaplan-Meier EstimateVentricular Dysfunction, RightSpironolactoneFibrosisRadionuclide AngiographyNorepinephrine