AED (Automated External Defibrillator)
How does an AED work?
Once an AED is turned on, it provides voice prompts to guide the user through the process. One of the first prompts instructs the user to connect the AED to the victim via the adhesive electrodes (pads) placed on the chest.
The AED then analyzes the victim's heart rhythm through the electrodes using a built-in computer program. It then determines if a shock is "needed"
If a shock is needed, the AED will prompt the user to press the button that delivers the shock. It will then re-analyze the heart rhythm to determine if more shocks are needed. If a shockable rhythm is not detected, the AED will prompt the user to check the victim for a pulse, and to perform CPR if needed.
The delivery of an electrical shock to a heart experiencing SCA (Sudden Cardiac Arrest)briefly stops all electrical activity in the heart. This brief "break" from the previous electrical disfunction can be enough for the heart to restart beating with a normal rhythm.
Not everyone can be saved from SCA-even with defibrillation. But early defibrillation, especially when delivered within three minutes of a person's collapse from SCA, does provide the best chance.