"Targeted Temperature Management at 33°C versus 36°C after Cardiac Arrest"  
NEJM
http://www.nejm.org/doi/full/10.1056/NEJMoa1310519?query=featured_home   
"CONCLUSIONS  

In unconscious survivors of out-of-hospital cardiac arrest of presumed cardiac cause, hypothermia at a targeted temperature of 33°C did not confer a benefit as compared with a targeted temperature of 36°C."