Hospital MortalityHeart ArrestEmergency Medical ServicesCardiopulmonary ResuscitationEmergency Medical TechniciansOut-of-Hospital Cardiac ArrestResuscitationAmbulancesElectric CountershockRetrospective StudiesHospitals, TeachingSurvival AnalysisTime FactorsSurvival RateHospitals, GeneralHospitals, UniversityProspective StudiesHospital CostsCell SurvivalMyocytes, CardiacTreatment OutcomeHospitals, UrbanNursing Staff, HospitalEconomics, HospitalHospitals, PediatricHospital Bed CapacityHospitals, SpecialHospitals, DistrictHospitals, PrivateFinancial Management, HospitalLength of StayCardiac OutputEmergency Service, HospitalDisease-Free SurvivalHospital PlanningHospitalizationHospital ChargesHospital DepartmentsHospitals, PsychiatricHeartCardiac Surgical ProceduresSurvivalHospital RecordsHospital UnitsArrhythmias, CardiacFollow-Up StudiesRisk FactorsEquipment and Supplies, HospitalDeath, Sudden, CardiacLibraries, HospitalGraft SurvivalPatient DischargePatient AdmissionSurgery Department, HospitalOutpatient Clinics, HospitalHospital Bed Capacity, 500 and overHospitals, CountyUnited StatesInfant, NewbornAmerican Hospital AssociationHospitals, MunicipalCross InfectionFood Service, HospitalHospital Information SystemsObstetrics and Gynecology Department, HospitalPrognosisPostoperative ComplicationsHeart DiseasesCohort StudiesMyocardial InfarctionHospitals, ReligiousAge FactorsMultivariate AnalysisKaplan-Meier EstimateCardiology Service, HospitalInpatientsHeart FailurePatient ReadmissionHospitals, MaternityDiagnosis-Related GroupsIncidenceCardiac CatheterizationCardiac TamponadeCardiac Pacing, ArtificialRisk AssessmentNursing Service, HospitalCardiomegalyEnglandLaboratories, HospitalHospital Shared ServicesMyocardiumProportional Hazards ModelsQuality of Health CareOutcome Assessment (Health Care)Predictive Value of TestsHospital Bed Capacity, under 100RegistriesHospital Bed Capacity, 100 to 299Myocardial ContractionElectrocardiography