aeds

AED stands for automated external defibrillator. An AED is a portable, battery-powered device designed to treat sudden cardiac arrest by analyzing the heart rhythm and delivering an electric shock when a shockable rhythm is detected. Modern devices are intended for use by laypersons, provide voice prompts and visual cues, and may guide users through CPR in real time.

How it works: An AED uses adhesive pads placed on the chest to assess the heart rhythm. After powering on, the device analyzes the rhythm and, if it detects ventricular fibrillation or pulseless ventricular tachycardia, instructs the rescuer to deliver a shock. Many devices are fully automatic and will deliver the shock without further action; others require the user to confirm before shocking. If a non-shockable rhythm is detected, the device directs continued CPR and reassessment.

Usage and settings: AEDs are widely deployed in public spaces such as airports, schools, workplaces, and sports facilities as part of community emergency response programs. They are designed to be used by people with minimal training and are compatible with CPR guidelines. Some devices offer pediatric dose options or attenuated energy levels for children.

Safety and limitations: AEDs are not a substitute for professional medical care. They are intended for use on individuals in sudden cardiac arrest due to shockable rhythms and may be ineffective in cases without a shockable rhythm, in asystole, or in non-recoverable conditions. Always call emergency services and begin CPR as advised by the device and local protocols.

Maintenance and training: Regular maintenance includes checking battery life, pad expiration dates, and proper storage. Pads and batteries have shelf lives and must be replaced as needed. Training in CPR and AED use is recommended, and many regions provide Good Samaritan protections for bystanders who use an AED.