Supposedly, in suspended animation, a person technically would not die, as long as he or she were able to preserve the minimum conditions in an environment extremely close to death and return to a normal living state. An example of such a case is Anna Bågenholm, a Swedish radiologist who allegedly survived 40 minutes under the ice in a frozen lake in a state of cardiac arrest and survived with no brain damage in 1999.

Other cases of hypothermia where people survived without damage are:

John Smith, a 14-year-old boy who survived 15 minutes under the ice in a frozen lake before paramedics arrived to pull him onto dry land and saved him.

Mitsutaka Uchikoshi, a Japanese man who survived the cold for 24 days in 2006 without food or water when he fell into a state similar to hibernation.

Paulie Hynek, who, at age two, survived several hours of hypothermia-induced cardiac arrest and whose body temperature reached 64 °F (18 °C).

Erika Nordby, a toddler who in 2001 was revived after two hours without apparent heartbeat with a body temperature of about 61 °F (16 °C).

More Info: en.wikipedia.org