In which situation would you use an Automated External Defibrillator (AED)?

Using an Automated External Defibrillator (AED) is critical in situations where a person is in cardiac arrest, evidenced by unresponsiveness and a lack of breathing. An AED is specifically designed to analyze the heart's rhythm and deliver an electric shock if necessary to restore a normal heartbeat. This device can significantly increase the chances of survival when used promptly in cardiac arrest scenarios.

In contrast, other situations mentioned do not warrant the use of an AED. If a patient is conscious but feeling faint, this indicates they are not in a state of cardiac arrest and do not require defibrillation; instead, they might need reassurance or monitoring. For minor cardiac complaints with stable vital signs, intervention typically would involve monitoring and possible transport to a medical facility, but not the immediate application of an AED. In instances of airway obstruction, the focus should be on clearing the airway rather than defibrillation, which is not applicable unless the patient is in cardiac arrest.