What is the first step when performing CPR on an unresponsive adult?

The first step when performing CPR on an unresponsive adult is to check for responsiveness by shaking and shouting. This assessment helps to determine whether the person is conscious or unresponsive and is crucial in guiding the subsequent steps of the emergency response.

By checking for responsiveness, you ensure that the individual is indeed in need of assistance. If the person does not respond to physical shaking or verbal cues, it confirms that they are unresponsive, which necessitates immediate intervention. This initial step is vital before moving on to summon emergency assistance or initiate chest compressions, as you must confirm that there is a serious issue that requires CPR.

Once unresponsiveness is established, the next appropriate actions would be to call for emergency assistance and then begin chest compressions if needed. Thus, verifying responsiveness is a critical first step in the chain of survival during such emergencies.