Which of the following is a sign that CPR may be necessary?

A person being unresponsive and not breathing is a critical sign indicating that CPR may be necessary. This condition signifies a lack of effective circulation and airway patency, which are vital for sustaining life. When a person is unresponsive, they cannot react to stimuli, indicating potential life-threatening situations, such as cardiac arrest. The absence of breathing further underscores the severe nature of the emergency, as it indicates that the individual is not receiving the oxygen needed for survival.

In such situations, initiating CPR can help restore blood flow and provide the person with some level of oxygenation until emergency medical services arrive. It’s essential to act quickly, as every second counts in these emergency circumstances. Recognizing this vital sign can be life-saving, emphasizing the importance of being trained in Basic Life Support techniques.