Cardiac arrest can result in brain damage and even death, according to the American Heart Association and Mayo Clinic. The brain does not get enough oxygen due to reduced blood flow and becomes unconscious. If the heart rhythm does not quickly return to normal, brain damage results, and then death.
Scientific studies show that cooling the body to 89.6 degrees Fahrenheit to 93.2 degrees Fahrenheit for 12 to 24 hours following cardiac arrest when the heart suddenly stops beating, protects the brain from damage and death, states the American Heart Association. This lowers the extent of any brain damage. In the case where sudden cardiac arrest has a duration of beyond 10 minutes, the person is not likely to survive, explains Mayo Clinic.