What is the first step in performing CPR on an adult?

The first step in performing CPR on an adult is to check for responsiveness. This step is crucial as it helps to determine whether the person is conscious or unconscious. When approaching someone who may require CPR, it’s essential to assess their responsiveness by gently shaking their shoulders and asking if they are okay.

By checking for responsiveness, you gather important information about the individual's condition. If the person does not respond, this indicates the possibility of a life-threatening situation, and you can then proceed with calling for emergency help. If they are unresponsive, additional steps—like opening the airway and beginning chest compressions—can follow in the correct order.

This initial assessment is vital not only for the safety of the victim but also for the rescuer, as it informs the next steps that need to be taken quickly and efficiently while waiting for professional help to arrive.