Remember - you may be the casualty's only chance of survival. You can boost that chance by 40% only by executing Cardio Pulmonary Resuscitation (CPR).
by yelling and trembling him/her. If there is no reaction, Call 112 and return to the casualty. In most locations the emergency paramedics can help you with CPR instructions. Pulse Location - Carotid artery (neck)
If the casualty is still not breathing normally, coughing or moving, begin chest compressions. Push down with 2 hands 2 inches 30 times right between the nipples. Pump at the rate of 100/minute, faster than once per second.
Tilt the head back and listen for breathing.
If not breathing normally, pinch nose and cover the mouth with yours and blow until you see the chest rise. Give 2 breaths. Each breath should take 1 second.