Answer: Put the person on his or her back on a firm surface.
Kneel next to the person's neck and shoulders.
Place the lower palm (heel) of your hand over the center of the person's chest, between the nipples.
Place your other hand on top of the first hand. Keep your elbows straight and position your shoulders directly above your hands.
Push straight down on (compress) the chest at least 2 inches (5 centimeters) but no more than 2.4 inches (6 centimeters). Use your entire body weight (not just your arms) when doing compressions.
Push hard at a rate of 100 to 120 compressions a minute. The American Heart Association suggests performing compressions to the beat of the song "Stayin' Alive." Allow the chest to spring back (recoil) after each push.
If you haven't been trained in CPR, continue chest compressions until there are signs of movement or until emergency medical personnel take over. If you have been trained in CPR, go on to opening the airway and rescue breathing.
Step-by-step explanation: