Which of the following indicates that CPR may be required?

When assessing whether CPR may be required, one of the key indicators is the responsiveness of the victim. If a victim is unresponsive, it signals that their brain may not be receiving adequate oxygen due to a lack of blood flow or respiratory function. This is a critical warning sign, as unresponsiveness often indicates that the heart may not be beating effectively or at all, leading to a risk of cardiac arrest.

In such situations, immediate action is necessary to initiate CPR. CPR is designed to manually circulate blood and provide oxygen to the brain and other vital organs, essentially taking over the role of the heart and lungs until professional medical help can arrive. Recognizing unresponsiveness as a cue to perform CPR is a fundamental aspect of first aid training, particularly in emergency scenarios. Therefore, identifying the victim's unresponsive state is crucial for determining the need for CPR.