What is the first step in using an AED?

The first step in using an Automated External Defibrillator (AED) is to turn on the AED. Activating the device is crucial because it initiates the machine's internal systems and prepares it to analyze the heart rhythm. Once the AED is powered on, the device will provide audio and visual prompts to guide the user through the next steps, which typically include attaching the pads to the victim's chest.

While calling for emergency services is an important action, it is generally done before or concurrently with preparing to use the AED, depending on the context. Checking for a pulse is also a critical assessment in the cardiac emergency response, but it isn’t necessary to do so before utilizing the AED. The device is designed to analyze the heart rhythm and determine if a shock is needed, which is why turning on the AED is the correct first step in the process.