What is resuscitation and what are its main techniques?

Resuscitation is all actions, the purpose of which is to return a person to life. Resuscitation consists of several stages. First, you should make sure that there is no consciousness, breathing and heartbeat. Then all airways are freed from tight collars, ties, and dentures are also removed. The victim should lie on a flat surface. At this time, cardiac massage and artificial respiration should be performed. It is very good if there are two rescuers, then resuscitation will be effective.