Profound Hypothermia in the Monkey With Recovery After Long Periods of Cardiac Standstill

Abstract
The body temperature of six adult monkeys was dropped by surface cooling to levels between 4° and 9°C. Cardiac standstill occurred when the body temperature reached 14°–11°C and lasted for periods from 42 minutes up to 2 hours and 3 minutes. All of these six monkeys survived the procedure and five lived for many months afterwards. The surviving monkeys appeared neurologically normal and their behavior, intelligence and habits were unchanged. Submitted on May 21, 1956