The American Red Cross says chest compressions, and not rescue breaths, are the key to successful CPR.
That's the major change the Red Cross has made to their CPR guidelines, which were released Monday.
The order of CPR is now flip-flopped.
Rescuers are to begin with 30 chest compressions at a rate of 100 per minute, and then two rescue breaths.
Rescuers who are uncomfortable with mouth-to-mouth are even encouraged to forego it and to keep doing chest compressions.
American Red Cross officials say it's a better system, because the old method of checking the airway and giving two rescue breaths was too slow.
Officials say this is the first time in five years that the guidelines have been changed.