Final answer:
When using an AED, you should remove any medication patches from the chest area to prevent electrical conduction and potential burns, clean the skin, and then apply AED pads and follow instructions, including performing CPR if necessary.
Step-by-step explanation:
If you are preparing to use an automated external defibrillator (AED) on a victim and notice a medication patch on their chest where the AED pads should be placed, you should immediately remove the patch using a gloved hand to avoid the risk of the patch conducting electricity and causing burns during defibrillation. Then, clean the area where the patch was located to ensure good adhesion of the AED pads. After the pads are applied, you can proceed with the AED's voice-guided instructions to attempt to correct the abnormal heart rhythm and provide the necessary care for the person suffering a cardiac attack. Remember that CPR is often recommended before using an AED to ensure oxygen-rich blood continues to circulate to vital organs.