hypothermic cardiac arrest

Most hypothermia deaths happen at temperatures of 30 to 50 degrees Fahrenheit, which is approximately 700 deaths per year.  about half of these are over 65.  Many patients who present with severe hypothermia are under the influence of alcohol or drugs.

Severe hypothermia is defined as a core body temp of less than 86 degrees Fahrenheit.  the victim's level of consciousness is a good indicator of how severe the hypothermia is.  In early stages, a victim can feel excited, with lots of shivering and increased metabolic rate.  later stages involve progressive slowing of body functions and decreased level of consciousness.

There are some conflicts in the literature, but general guidelines for severe hypothermia without signs of life are:  (read more here..... http://www.carpentercprsolutions.com/-blog/hypothermic-cardiac-arrest)