“…Recent guidelines on post-resuscitation care have recommended actively preventing fever (defined as a temperature > 37.7 °C) for at least 72 h in patients who remain unconscious after cardiac arrest [5]; these guidelines were mainly driven by a recent randomized trial of 1850 out-of-hospital cardiac arrest survivors, which showed similar outcome between those treated with TTM at 33 °C and those treated when body temperature exceeded 37.7 °C [6]. In this study, surface cooling devices and intravascular methods were used in both groups to achieve target temperatures; as such, nearly 50% of patients in the 37.7 °C group required such devices.…”