If you've ever watched a medical show on television, then you've likely seen a defibrillator in action. A defibrillator is used to shock a person's irregular heart rhythm back into normal rhythm. An Automated External Defibrillator, or AED, is a miniature version of that. AEDs are placed strategically in public places like schools, gyms, restaurants, and offices, in case of emergencies. An AED device will measure someone's heart rate and rhythm on its own to determine if a shock is needed. In this program, we'll go over when and how to use an AED. We'll discuss what to do if someone becomes unconscious, including checking for breathing and performing CPR. We'll go over who you can use an AED on and the steps to using one properly.