For nearly 40 years, CPR guidelines have trained people to follow these simple A-B-C instructions—tilt the victim's head back to open the airway, then pinch their nose and do a succession of breaths into their mouth, and finally perform chest compressions.
But now, the AHA says starting with the C of chest compressions will help oxygen-rich blood circulate throughout the body sooner, which is critical for people who have had a heart attack. With this shift, rescuers and responding emergency personnel should now follow a C-A-B process—begin with chest compression, then move on to address the airway and breaths. This change applies to adults, children, and babies, but does not apply to newborns.
