AED – What You Need to know By Rescue Resources CPR WisconsinAugust 12, 2020March 23, 2022AED AED - what is it? AED stands for Automated External Defibrillator.AED can detect a “shockable” rhythm while a person is in cardiac arrest.These portable electronic devices can be intimidating to use, but are actually quite user friendly.Check out this video for a brief preview of how to use an AED.