When approaching a person who is suspected of experiencing breathing and/or heart arrest, we must first check the state of consciousness (asking to a question or slight shaking of the patient) and then we have check if the patient breathes and did he/she had the pulse. Cardiopulmonary resuscitation begins when the patient is unconscious, does not have pulse and does not breathe normally (ie if he/she is breathe less than 10/min.). It is important to note that pulse determination is sometimes very difficult, especially in people in hypothermia, and inexperienced people often push their own pulse instead of pulse of patient. Because of these aggravating circumstances, it is a good idea to start with the Cardiopulmonary resuscitation when the patient is unconscious, not breathing, or breathing agonally. Establishing a cardiorespiratory arrest should be started as soon as possible with basic life support measures, inviting professional help whose team will continue with the measures of advanced life care and care for the patients. Basic life support measures include providing passage of the respiratory tract, artificial breathing and heart massage. To an unconscious person we ensure the passage of the respiratory tract by throwing the head and raising the lower jaw, thus raising the base of the tongue that most often obstructs the respiratory tract of these persons. In children, the cardiovascular causes of this condition are far fewer (<15-20%), and in leading places are trauma, poisoning, various respiratory disturbances (eg respiratory tract obstruction, smoke inhalation, drowning, infections).