The investigators hypothesize that
1. if decrease in SctO2 level is caused by the degree of hypothermia, SctO2 level in the
33-TH may be lower than that in the 36-TH group.
2. if decrease in SctO2 level is not caused by the degree of hypothermia but caused by
brain injury, SctO2 level may be associated with only the prognosis of cardiac arrest
victims regardless of core temperatures.
The primary objective of this study is to compare the 72-hour changes in SctO2 level between
the 36-TH and 33-TH groups in cardiac arrest victims.