Be a lifesaver; not a bystander. Learn Continuous Chest Compression CPR from Gordon A. Ewy, MD, and Karl Kern, MD, the physician researchers who developed this new approach to CPR. Based on much research, including from the University of Arizona Resuscitation Research Group, the American Heart Association has changed its guidelines. It now recommends that in the event of witnessed cardiac arrest (you see or hear someone suddenly collapse), chest compressions should be done with minimal interruptions. For people trained in CPR, the ABC (airway, breathing, compression) steps that you probably learned have been changed to CAB (compressions, airway, breaths).