Chest compressions should be the first step in addressing cardiac arrest. Therefore, the American Heart Association (AHA) now recommends that the A-B-Cs (Airway-Breathing-Compressions) of cardiorespiratory resuscitation (CPR) be changed to C-A-B (Compressions-Airway-Breathing).
The changes were documented in the 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care, published in the November 2 supplemental issue of Circulation: Journal of the American Heart Association, and represent an update to previous guidelines issued in 2005.