title: Serum Cortisol Levels as a Predictor of Neurologic Survival inSuccessfully Resuscitated Victims of Cardiopulmonary Arrest.
abstract: BACKGROUND
  Out-of-hospital cardiac arrest (OHCA) is the most stressful lifetime event for the victims and an important issue for the emergency physicians. The status of the hypothalamic pituitary- adrenal axis (HPA) function in successfully resuscitated victims of cardiopulmonary arrest has been recently of an interest for the researchers.
  
  
  METHODS
  In a prospective cohort study, 50 successfully resuscitated OHCA victims' serum cortisol levels were measured 5 minutes and 1 hour after return of spontaneous circulation (ROSC). The data were analyzed comparing the one-week neurologic survival.
  
  
  RESULTS
  Fifty blood samples were obtained for serum cortisol levels after 5 minutes of ROSC. Fourteen patients (28%) pronounced death during one hour after CPR. Blood sample from living 36 patients after one hour post-CPR were obtained for second cortisol assay. Eleven patients (22%) were neurologically survived after one week. Seven patients (14%) were discharged finally from hospital with good neurologic recovery. The serum cortisol levels in both the neurologically surviving and the non-surviving after 5 minutes of ROSC patients were 63.4 ±13.6 and 43.2±25.5(microg/ml), (mean±S.D., respectively) and after 1 hour of ROSC patients' serum cortisol levels were 64.9±13.1 and 47.3±27.1(microg/ml), (mean±S.D., respectively). The difference was significantly higher in neurologically survived group in both 5 minutes and 1 hour after ROSC (P= 0.015 and 0.013 respectively).
  
  
  CONCLUSIONS
  serum cortisol levels after 5 minutes and one hour of ROSC in victims of cardiopulmonary arrest are significantly higher in neurologically survived than non-survived patients.
authors.affiliation: Department of Emergency Medicine, Hazrate-Rasul Hospital ,Tehran University of Medical Science, Tehran, Iran.
authors.forename: Nader
authors.initials: N
authors.lastname: Tavakoli
authors.forename: Ali
authors.initials: A
authors.lastname: Bidari
authors.forename: Samad
authors.initials: S
authors.lastname: Shams Vahdati
keywords: Cardiopulmonary Arrest; Cortisol Level; Neurologic Outcome