Can a user be shocked by an AED?

In most cases no. The unit is programmed to only shock if it detects a ventricular fibrillation (VF or abnormal heart rhythm). Now, if it is wet there would probably be an elevated chance for a shock but it is still rare. The AED will provide audible instructions and let user know when it is going to send the electric shock. Remember Рthis shock will not start a dead heart, but it will stop certain lethal rhythms and give the heart a chance to spontaneously re-establish an effective rhythm on its own. Wearing any type of rubber gloves (latex or vinyl) will also help lower the chances of a shock while administering an AED.