The next treatment after finding that the victim is not responsive and not breathing normally, and after calling 911, is to begin CPR immediately. This involves starting chest compressions at a rate of 100-120 compressions per minute and giving 2 rescue breaths after every 30 compressions. This combination of chest compressions and rescue breaths helps maintain circulation and provide oxygen to vital organs until professional help arrives. It is essential to continue this cycle until emergency responders take over or the victim begins to breathe normally. The process includes pushing firmly in the middle of the chest hard and fast, allowing the chest to recoil between compressions to maximize blood flow.