Check the scene for safety
Tap the person and shout to see if they respond
Call emergency services immediately or direct someone else to call
Send someone to get an AED if available
Check for normal breathing for no more than 10 seconds
If not breathing normally, start chest compressions
Place the heel of one hand on the center of the chest
Place the other hand on top and interlock fingers
Keep arms straight and shoulders over your hands
Compress the chest hard and fast at a rate of 100 to 120 per minute
Push down about 2 to 2.4 inches
Allow the chest to fully recoil after each compression
Minimize pauses in compressions
Give 30 chest compressions
Open the airway by tilting the head back and lifting the chin
Pinch the nose shut
Give 2 rescue breaths if trained and willing
Make each breath last about 1 second and make the chest rise
Continue cycles of 30 compressions and 2 breaths
Use the AED as soon as it arrives
Turn on the AED and follow the voice prompts
Attach the pads to the bare chest as shown on the pads
Clear everyone before the AED analyzes the rhythm
Deliver a shock if instructed and clear everyone
Resume CPR immediately after the shock or if no shock is advised
Continue until emergency help takes over, the person starts breathing normally, or you are too exhausted to continue