AmiodaroneHeart FailureHeartAnti-Arrhythmia AgentsHeart RateCardiomyopathy, DilatedHemodynamicsStroke VolumeVentricular Function, LeftNatriuretic Peptide, BrainVentricular Dysfunction, LeftMyocardiumHeart DiseasesCardiac Output, LowTreatment OutcomeHeart Failure, SystolicCardiac Pacing, ArtificialAdrenergic beta-AntagonistsAtrial FibrillationEchocardiographyFollow-Up StudiesAngiotensin-Converting Enzyme InhibitorsMyocardial InfarctionChronic DiseaseTime FactorsDiureticsCardiotonic AgentsHeart Failure, DiastolicAtrial Natriuretic FactorProspective StudiesElectrocardiographyRisk FactorsDigoxinHeart VentriclesVentricular RemodelingHeart Function TestsPrognosisCheyne-Stokes RespirationHeart TransplantationMyocardial ContractionArrhythmias, CardiacHeart AtriaCardiomyopathiesBenzofuransDogsRetrospective StudiesHospitalizationPropanolaminesCardiomegalyTreatment FailureTachycardiaExercise TestPulmonary Wedge PressureVentricular DysfunctionPredictive Value of TestsSympathetic Nervous SystemBlood PressureMyocardial IschemiaDouble-Blind MethodSeverity of Illness IndexCarbazolesBiological MarkersHeart Defects, CongenitalSurvival AnalysisSpironolactoneNorepinephrineDiastoleSystoleMyocytes, CardiacCardiovascular AgentsDisease Models, AnimalPatient ReadmissionFurosemideHeart-Assist DevicesRisk AssessmentExercise ToleranceTachycardia, VentricularSurvival RateProportional Hazards ModelsMetoprololEchocardiography, DopplerDeath, Sudden, CardiacPacemaker, ArtificialOxygen ConsumptionDefibrillators, ImplantableCaptoprilMineralocorticoid Receptor AntagonistsCardiac OutputMilrinoneVasodilator AgentsDose-Response Relationship, DrugCohort StudiesElectrocardiography, AmbulatoryEnalaprilNatriuretic AgentsKidney Failure, ChronicMyocarditisHypertrophy, Left VentricularUnited StatesElectric Countershock