Heart FailurePrognosisHeartHeart RateCardiac Output, LowHeart Failure, SystolicHeart Failure, DiastolicStroke VolumeHeart DiseasesMyocardiumCardiomyopathy, DilatedNatriuretic Peptide, BrainHeart TransplantationVentricular Function, LeftVentricular Dysfunction, LeftTreatment OutcomeTreatment FailureHemodynamicsChronic DiseaseFollow-Up StudiesTime FactorsAdrenergic beta-AntagonistsVentricular RemodelingEchocardiographyProspective StudiesHeart Defects, CongenitalCardiotonic AgentsMyocardial ContractionRisk FactorsRetrospective StudiesCardiac Pacing, ArtificialMyocardial InfarctionSurvival AnalysisHeart Function TestsCardiomyopathiesSurvival RateCardiomegalyPredictive Value of TestsMyocytes, CardiacDiureticsHospitalizationAngiotensin-Converting Enzyme InhibitorsBiological MarkersHeart AtriaHeart-Assist DevicesSeverity of Illness IndexExercise TestProportional Hazards ModelsMyocardial IschemiaFetal HeartPropanolaminesKaplan-Meier EstimateDisease Models, AnimalSystoleHeart VentriclesHeart ValvesRisk AssessmentDiastoleKidney Failure, ChronicDogsExercise ToleranceCohort StudiesDisease ProgressionDigoxinAtrial Natriuretic FactorVentricular DysfunctionCarbazolesSympathetic Nervous SystemEchocardiography, DopplerOxygen ConsumptionPatient ReadmissionHeart BlockMultivariate AnalysisAcute DiseaseVentricular PressureCardiovascular AgentsElectrocardiographyDouble-Blind MethodPulmonary Wedge PressureMineralocorticoid Receptor AntagonistsCoronary DiseaseMetoprololBlood PressureAge FactorsSpironolactonePacemaker, ArtificialFailure to ThriveCardiac Resynchronization TherapyIncidenceDeath, Sudden, CardiacNorepinephrineLiver Failure, AcuteAtrial FibrillationVasodilator AgentsArrhythmias, CardiacFibrosisCardio-Renal SyndromeHypertrophy, Left VentricularImmunohistochemistryCase-Control Studies