What is the first step you should take when using an Automated External Defibrillator (AED)?

When using an Automated External Defibrillator (AED), the first step is to turn on the AED. This action is critical because it initiates the device's self-check process and allows it to start providing audible and visual prompts to guide you through the subsequent steps of defibrillation. The AED will instruct you on how to apply the pads correctly, assess the heart rhythm, and deliver a shock if necessary.

Turning on the AED first ensures that you are operating with the most updated instructions, and it prepares the device to assist you in managing the emergency effectively. Once the AED is activated, you can then follow its prompts, which may include calling emergency services if you haven't already or attaching the pads to the patient’s chest to assess their heart rhythm.