The value of CPR by is rarely derived from successful resuscitation. In most cases, the person performing CPR is someone who was trained briefly on chest compre

The value of CPR by is rarely derived from successful resuscitation. In most cases, the person performing CPR is someone who was trained briefly on chest compressions and mouth-to-mouth which to be performed until a EMT arrives or an AED becomes available. The purpose of this procedure is to get some, however small, bit of oxygen into the patient to prevent brain damage.