The studies found had adequate methodological quality to support the use of therapeutic hypothermia within the first six hours of resuscitated patients after cardiac arrest outside the hospital and who had TV/FV rhythm. There is not enough evidence to support its use in resuscitated patients with other baseline rhythms; other new studies with larger number of patients are necessary to prove its usefulness in this prevalent condition. Not enough evidence was found to recommend a specific cooling method; except for hemofiltration which proved to be ineffective.