Heart ArrestCardiopulmonary ResuscitationOut-of-Hospital Cardiac ArrestEmergency Medical ServicesResuscitationEmergency Medical TechniciansBlood CirculationHypothermia, InducedVentricular FibrillationElectric CountershockAsphyxiaHeart MassageAmbulancesDefibrillatorsLiquid VentilationTime FactorsTreatment OutcomeAdvanced Cardiac Life SupportRetrospective StudiesSurvival AnalysisProspective StudiesSwineComaEpinephrineMyocytes, CardiacCoronary CirculationNervous System DiseasesVasopressinsPatient DischargeHemodynamicsSurvival RateElectrocardiographyRecovery of FunctionDisease Models, AnimalCardiac OutputHospitals, TeachingBody TemperatureHospitals, GeneralHospitals, UniversityBlood PressureHeartHospital CostsCarbon DioxideCardiac Surgical ProceduresRandom AllocationArrhythmias, CardiacExtracorporeal CirculationHospitals, UrbanNursing Staff, HospitalDeath, Sudden, CardiacEconomics, HospitalHospitals, PediatricPulmonary CirculationHospital Bed CapacityHospitals, DistrictHospitals, SpecialReturn to WorkLength of StayFinancial Management, HospitalHospitals, PrivateEmergency Service, HospitalHeart DiseasesHospitalizationCardiac CatheterizationHospital PlanningCardiac Pacing, ArtificialHospital ChargesCardiomegalyMyocardiumCardiac TamponadeHospital DepartmentsHospitals, PsychiatricMyocardial ContractionHospital UnitsHeart VentriclesCollateral CirculationHospital RecordsHeart FailureRisk FactorsMyocardial InfarctionFollow-Up StudiesHeart RateEquipment and Supplies, HospitalInfant, NewbornLibraries, HospitalPatient AdmissionDogsPostoperative ComplicationsSurgery Department, HospitalOutpatient Clinics, HospitalCardiomyopathiesUnited StatesEchocardiographyCerebrovascular CirculationEnterohepatic CirculationHospital Bed Capacity, 500 and overHospitals, CountyMyoblasts, CardiacHeart Defects, CongenitalPregnancy