What is the indication for using an automated external defibrillator (AED)?

The indication for using an automated external defibrillator (AED) is when the patient is unresponsive, not breathing normally, and has no detectable pulse. This scenario typically suggests that the patient is experiencing a cardiac arrest, which is a critical situation requiring immediate intervention. The use of an AED is vital in such instances as it can analyze the heart's rhythm and deliver shocks as necessary to restore a normal heart rhythm.

When a patient is unresponsive and not breathing adequately, it indicates that the heart may not be effectively pumping blood. Subsequently, the rapid deployment of an AED can significantly increase the chances of survival by potentially converting a lethal heart rhythm back to a more stable, effective one. The prompt use of an AED, combined with appropriate CPR, is critical in maximizing survival rates.

Other patient scenarios, such as being responsive and oriented, feeling faint while conscious, or having a stable heart rate, do not warrant the immediate use of an AED as they do not present signs of cardiac arrest. In these cases, the focus would instead be on monitoring the patient's condition or providing supportive care rather than aggressive resuscitation measures like defibrillation.