If a person suffers cardiac arrest
, the best outcome is achieved with quick recognition of symptoms, immediate initiation of CPR, and early defibrillation
. If CPR is started immediately, and done correctly, and especially if there is an automatic electronic defibrillator (AED) nearby, chances of survival are increased. The types of mental deficits suffered vary from person to person and degree depending on how long the person is without oxygen
. Regaining brain function depends on how severe the damage is. Some people function normally with small deficits, and some are never the same.