What action do you take after determining a victim requires CPR?

After determining that a victim requires CPR, the appropriate action is to activate Emergency Medical Services (EMS) before starting CPR. This step is critical as it ensures that professional medical assistance is on the way while you provide lifesaving measures. Activating EMS alerts trained personnel who can provide advanced care and transport the victim to a medical facility.

Following this action, you would commence CPR, which includes performing chest compressions and rescue breaths as per the current CPR guidelines. It's important to sequence actions correctly: verifying the need for CPR, getting emergency help, and then administering CPR can effectively increase the chances of survival for the victim.