ENO2 and cardiac arrest: Currently, NSE values are only adjusted among samples with a high haemolysis index at the corresponding timepoint, however, early haemolysis associated with cardiac arrest is not taken into account, which may affect the serum concentration of NSE.13 Our results show that patients with a high admission free-hgb had a higher NSE at 48 h, but a higher mortality rate or an increased incidence of poor neurological outcome were not observed in this group.