Which of the following actions should be taken when using an AED on a guest?

When using an AED on a guest, it is essential to ensure that the guest's chest is dry. This is crucial because moisture can interfere with the electrical conductivity of the AED pads, making them less effective in delivering a shock. Wet or sweaty skin can also create a risk of burns or inadequate connection between the pads and the skin.

Drying the chest ensures that the pads adhere properly and that the device can analyze the heart rhythm accurately. This action maximizes the chances of the AED functioning correctly and increases the likelihood of a positive outcome for the person in need of assistance. Proper placement and conditions are vital components to consider when using an AED.