If Theo were in respiratory arrest with a central pulse of ≤ 60 bpm, what action should Amy take?

In the situation where Theo is in respiratory arrest and has a central pulse of 60 beats per minute or less, the appropriate action is to start CPR immediately. This is because a pulse rate at or below 60 bpm in the context of respiratory arrest indicates that the victim may not be getting adequate blood flow to vital organs, leading to a high risk for cardiac arrest or other life-threatening complications.

Prompt initiation of CPR is critical in such cases, as it provides essential chest compressions that help maintain circulation and preserve brain function until advanced care can be provided. The American Heart Association guidelines emphasize the importance of early CPR, especially when there is a combination of respiratory arrest and bradycardia (low heart rate) in adults. This response can help increase the chances of survival and minimize the risk of long-term damage due to lack of oxygen to vital organs.

In this context, merely monitoring the situation, administering oxygen, or waiting for help would delay vital action and could lead to further deterioration of Theo's condition. Therefore, starting CPR is the most appropriate and life-saving step to take immediately.