Heart FailurePatient SelectionHeartSelection, GeneticHeart RateTreatment OutcomeCardiac Output, LowHeart Failure, SystolicHeart Failure, DiastolicStroke VolumeTime FactorsHeart TransplantationTreatment FailureVentricular Dysfunction, LeftFollow-Up StudiesMyocardiumRetrospective StudiesHeart DiseasesPrognosisChronic DiseaseCardiomyopathy, DilatedProspective StudiesNatriuretic Peptide, BrainVentricular Function, LeftRisk FactorsHemodynamicsEchocardiographyCardiac Pacing, ArtificialAdrenergic beta-AntagonistsPredictive Value of TestsVentricular RemodelingHeart-Assist DevicesRisk AssessmentHeart Defects, CongenitalCardiotonic AgentsMyocardial ContractionSeverity of Illness IndexMyocardial InfarctionPostoperative ComplicationsSurvival RateSurvival AnalysisHeart Function TestsHospitalizationClinical Trials as TopicTeaching RoundsCardiomyopathiesCardiomegalyMyocytes, CardiacBiological MarkersDiureticsAngiotensin-Converting Enzyme InhibitorsHeart AtriaCardiac Resynchronization TherapyHeart VentriclesProportional Hazards ModelsCohort StudiesFetal HeartKidney Failure, ChronicMyocardial IschemiaExercise TestPropanolaminesRandomized Controlled Trials as TopicDisease Models, AnimalKaplan-Meier EstimateSystoleCardiac CatheterizationDogsAge FactorsHeart ValvesUnited StatesDiastoleMultivariate AnalysisExercise ToleranceDigoxinAcute DiseaseElectrocardiographyDisease ProgressionAtrial Natriuretic FactorVentricular DysfunctionReproducibility of ResultsCarbazolesHeart Valve ProsthesisOxygen ConsumptionReoperationSympathetic Nervous SystemArrhythmias, CardiacHeart Valve Prosthesis ImplantationPatient ReadmissionDefibrillators, ImplantableEchocardiography, DopplerHeart BlockVentricular PressureChi-Square DistributionStrokeCardiovascular AgentsDouble-Blind MethodMutationSensitivity and SpecificityPulmonary Wedge PressureFetal Therapies