Can a Pocket-Sized defibrillator deliver when it counts?

This study is a registry that tracks what happens when the HeartStart FRx, an automated external defibrillator (AED), is used on people suspected of having a cardiac arrest. The goal is to verify the device's safety and performance in real-world situations, such as whether it accurately analyzes heart rhythms and delivers a shock when needed. The registry includes about 1,400 people who had the device's pads placed on them, regardless of whether a shock was given. By collecting this event data, researchers hope to confirm the device works as intended when used according to the manual.