Heart FailureHeartHeart RateTreatment OutcomeCardiac Output, LowHeart Failure, SystolicHeart Failure, DiastolicStroke VolumeMyocardiumOutcome Assessment (Health Care)Heart DiseasesFollow-Up StudiesHeart TransplantationTime FactorsTreatment FailureCardiomyopathy, DilatedNatriuretic Peptide, BrainChronic DiseaseVentricular Function, LeftProspective StudiesVentricular Dysfunction, LeftHemodynamicsPrognosisRetrospective StudiesRisk FactorsAdrenergic beta-AntagonistsVentricular RemodelingHeart Defects, CongenitalEchocardiographyCardiotonic AgentsMyocardial ContractionMyocardial InfarctionCardiac Pacing, ArtificialSeverity of Illness IndexHospitalizationPregnancy OutcomeHeart Function TestsPredictive Value of TestsCardiomyopathiesCardiomegalyDiureticsMyocytes, CardiacAngiotensin-Converting Enzyme InhibitorsBiological MarkersCohort StudiesHeart AtriaRisk AssessmentSurvival AnalysisHeart-Assist DevicesMyocardial IschemiaExercise TestSurvival RateFetal HeartDisease Models, AnimalPropanolaminesProportional Hazards ModelsKidney Failure, ChronicSystoleHeart VentriclesDouble-Blind MethodHeart ValvesKaplan-Meier EstimateDiastoleExercise ToleranceDogsPatient ReadmissionDigoxinUnited StatesVentricular DysfunctionAcute DiseaseAtrial Natriuretic FactorDisease ProgressionCardiovascular AgentsCarbazolesOxygen ConsumptionSympathetic Nervous SystemEchocardiography, DopplerAge FactorsOutcome and Process Assessment (Health Care)IncidenceHeart BlockVentricular PressureRandomized Controlled Trials as TopicMultivariate AnalysisQuality of LifeBlood PressurePulmonary Wedge PressureMineralocorticoid Receptor AntagonistsElectrocardiographyMetoprololPacemaker, ArtificialFailure to ThriveSpironolactoneCardiac Resynchronization TherapyPostoperative ComplicationsAtrial FibrillationChi-Square DistributionHospital MortalityDeath, Sudden, CardiacLogistic Models