ComaFemur Head NecrosisAmputationHematoma, SubduralArachnoidFoot UlcerArachnoid CystsDiabetic FootDefibrillatorsSubarachnoid HemorrhageCardiopulmonary ResuscitationCerebral HemorrhageHeart ArrestTomography, X-Ray ComputedRetrospective StudiesLegEmergency Medical ServicesCerebral AngiographyEmergency Service, HospitalIncidenceTreatment OutcomeProspective StudiesMagnetic Resonance ImagingCohort StudiesFollow-Up StudiesTime FactorsRisk Factors