You earn "instructor" certifications by successfully completing the course. This means you are fully certified at that instructor level at the end of the course. The Lifesaving Society offers the following instructor certifications:
CPR minimizes the possibility of brain damage by supplying oxygen to the brain, but the heart won't start beating again without defibrillation. The possibility of successful resuscitation declines 7-10% with each minute that passes without defibrillation. After 12 minutes, less than 2-5% of victims will live.