Cardiovascular Surgical ProceduresHeart FailureHeartHeart RateSurgical Procedures, OperativeCardiac Output, LowHeart Failure, SystolicTreatment OutcomeHeart Failure, DiastolicStroke VolumeHeart DiseasesTime FactorsMyocardiumHeart TransplantationRetrospective StudiesFollow-Up StudiesTreatment FailureCardiomyopathy, DilatedHemodynamicsVentricular Function, LeftNatriuretic Peptide, BrainChronic DiseaseProspective StudiesVentricular Dysfunction, LeftPostoperative ComplicationsHeart Defects, CongenitalAdrenergic beta-AntagonistsVentricular RemodelingEchocardiographyRisk FactorsCardiotonic AgentsMyocardial ContractionPrognosisSurgical Procedures, MinorCardiac Pacing, ArtificialCardiac Surgical ProceduresMyocardial InfarctionHeart Function TestsCardiomyopathiesHeart AtriaCardiomegalyHospitalizationMyocytes, CardiacHeart-Assist DevicesDiureticsSeverity of Illness IndexAngiotensin-Converting Enzyme InhibitorsDisease Models, AnimalPredictive Value of TestsRisk AssessmentMyocardial IschemiaBiological MarkersVascular Surgical ProceduresExercise TestFetal HeartSurgical Procedures, Minimally InvasivePropanolaminesDogsAmbulatory Surgical ProceduresHeart VentriclesOral Surgical ProceduresSurgical Procedures, ElectiveSystoleHeart ValvesPatient ReadmissionKidney Failure, ChronicDiastoleSurvival RateReconstructive Surgical ProceduresCohort StudiesSurvival AnalysisDigoxinExercise ToleranceDouble-Blind MethodGynecologic Surgical ProceduresVentricular DysfunctionAtrial Natriuretic FactorProportional Hazards ModelsCarbazolesDigestive System Surgical ProceduresSympathetic Nervous SystemOxygen ConsumptionUnited StatesThoracic Surgical ProceduresEchocardiography, DopplerIncidenceHeart BlockLength of StayPacemaker, ArtificialUrologic Surgical ProceduresOtorhinolaryngologic Surgical ProceduresVentricular PressureReoperationAge FactorsPreoperative CareObstetric Surgical ProceduresBlood PressureElectrocardiographyCardiovascular Agents