Patient ReadmissionMyocytes, CardiacPatient DischargeLength of StayCardiac OutputHeartCardiac Surgical ProceduresArrhythmias, CardiacHeart FailureDeath, Sudden, CardiacRetrospective StudiesMedicareTime FactorsRisk FactorsTreatment OutcomeCardiomegalyMyocardial InfarctionCardiac TamponadeCardiac Pacing, ArtificialHospitalizationHeart DiseasesHospital CostsDiagnosis-Related GroupsMyocardiumUnited StatesCardiac CatheterizationHospitalistsHospital MortalityPostoperative ComplicationsHospitalsMyocardial ContractionPatient AcuityProspective StudiesAftercareHeart ArrestQuality of Health CareHeart VentriclesOutcome Assessment (Health Care)Outcome and Process Assessment (Health Care)Follow-Up StudiesCardiac Output, LowQuality Indicators, Health CareFee-for-Service PlansCohort StudiesHospitals, PsychiatricMyoblasts, CardiacInsurance Claim ReviewMultivariate AnalysisCardiomyopathiesLogistic ModelsRisk AssessmentCardiac MyosinsCardiac Imaging TechniquesElectrocardiographyCardiac GlycosidesRisk AdjustmentContinuity of Patient CareHeart RateEchocardiographyPatient AdmissionEmergenciesOut-of-Hospital Cardiac ArrestPredictive Value of TestsHemodynamicsInpatientsCardiac VolumeComorbidityAcute DiseaseVentricular RemodelingHeart TransplantationTroponin IPrognosisHospitals, TeachingStroke VolumeVentricular Function, LeftCoronary Artery BypassHospitals, CommunityEmergency Service, HospitalHospitals, VeteransHeart Defects, CongenitalMedication ReconciliationCardiology Service, HospitalProportional Hazards ModelsCritical PathwaysHospitals, PediatricPneumoniaChi-Square DistributionAmbulatory Surgical ProceduresSurgical Procedures, OperativeBlood PressureCardiac Resynchronization TherapyHeart Function TestsCalciumTroponin TIntensive Care UnitsHeart Conduction SystemCardiopulmonary ResuscitationOntarioHeart NeoplasmsCardiac Care Facilities