CPR pumps blood to the organs when the heart stops during a cardiac emergency, but restarting the heart requires an automated external defibrillator (AED). These devices are available in public areas like airports, subway stations, libraries, schools, parks, shopping malls, and sports arenas. An AED is needed when a victim does not have a pulse.
After delivering five cycles of chest compressions, another bystander should go to retrieve an AED. The voice-automated device will guide the rescuer through each step of use. After using the AED, rescuers should confirm that the victim's pulse returns before they stop delivering chest compressions. They may continue rescue breathing if the victim is not breathing on their own.