Introduction: Discharge rate of the patients from the hospital following cardiopulmonary resuscitation (CPR) is lower than the return of spontaneous circulation. The aim of this study is to investigate the predictive value of serum C-reactive protein (CRP) and cortisol on prognosis following adult cardiopulmonary resuscitation. Material and Method: Seventy patients who were admitted to emergency department involved in this study and were separated in to three groups. There were twenty six patients with acute coronary syndrome and were applied CPR in group 1, fourteen patients who were applied CPR with different diagnosis except acute coronary syndrome in group 2, thirty patients with acute coronary syndrome and were not applied CPR in group 3. Blood samples were drawn from a peripheral vein at the hours 0-4, 24 and 48 for analysing CRP and cortisol levels.