Heart FailureHeartHeart RateCardiac Output, LowHeart Failure, SystolicHeart Failure, DiastolicStroke VolumeHeart DiseasesMyocardiumBipolar DisorderHeart TransplantationCardiomyopathy, DilatedNatriuretic Peptide, BrainVentricular Function, LeftChronic DiseaseVentricular Dysfunction, LeftTreatment FailureHemodynamicsTreatment OutcomeMental DisordersAdrenergic beta-AntagonistsVentricular RemodelingTime FactorsAnxiety DisordersMood DisordersHeart Defects, CongenitalEchocardiographyCardiotonic AgentsFollow-Up StudiesMyocardial ContractionRisk FactorsProspective StudiesCardiac Pacing, ArtificialHeart Function TestsCardiomyopathiesPrognosisCardiomegalyMyocardial InfarctionMyocytes, CardiacSeverity of Illness IndexDiureticsDisease Models, AnimalHospitalizationDiagnostic and Statistical Manual of Mental DisordersAngiotensin-Converting Enzyme InhibitorsHeart AtriaHeart-Assist DevicesBiological MarkersRetrospective StudiesFetal HeartMyocardial IschemiaPropanolaminesExercise TestPredictive Value of TestsSystoleDogsComorbidityHeart ValvesHeart VentriclesDiastoleDepressive Disorder, MajorKidney Failure, ChronicExercise ToleranceDigoxinAtrial Natriuretic FactorVentricular DysfunctionRisk AssessmentDepressive DisorderCarbazolesCohort StudiesAttention Deficit Disorder with HyperactivitySympathetic Nervous SystemOxygen ConsumptionPatient ReadmissionDouble-Blind MethodHeart BlockProportional Hazards ModelsEchocardiography, DopplerVentricular PressureCardiovascular AgentsSurvival AnalysisCase-Control StudiesPulmonary Wedge PressureObsessive-Compulsive DisorderMineralocorticoid Receptor AntagonistsStress Disorders, Post-TraumaticUnited StatesPrevalenceFailure to ThriveAutistic DisorderBlood PressureSurvival RateSpironolactoneMetoprololDisease ProgressionAge FactorsPacemaker, ArtificialAcute DiseaseElectrocardiographyCardiac Resynchronization Therapy