What should Amy do after determining that Theo is unresponsive?

After determining that Theo is unresponsive, the most appropriate course of action is to activate emergency services and, if available, retrieve an Automated External Defibrillator (AED) while also alerting a rapid response team. This course of action is critical as it ensures that professional medical assistance is on its way promptly, which can be crucial for patient outcomes in emergencies like cardiac arrest or severe medical crises.

Activating emergency services is essential because immediate professional intervention can significantly increase the chances of survival. The rapid response team is typically equipped with advanced skills and equipment to manage critical situations effectively. The AED is a vital tool for treating certain types of cardiac arrest and can be used as soon as it is available, often improving the likelihood of successful resuscitation.

Beginning CPR or checking for a pulse and breathing first, while important in some situations, may delay the initiation of emergency medical assistance. It is essential to maintain the chain of survival, and calling for help is the first link in that chain.