Defibrillator
An automated external defibrillator is a lightweight, portable electronic device that automatically diagnoses life-threatening cardiac arrhythmias (irregular heartbeat).
It is able to treat them through defibrillation (delivery of an electric shock to stop arrhythmia) allowing the heart to reestablish an effective rhythm.
![Defibrillator Defibrillator](https://neutechmedical.com/wp-content/uploads/2022/03/autometic-extranal-difebriletor-300x200.jpg)
This is usually use during or after a sudden cardiac arrest (SCA), in which the heart stops functioning abruptly.
Most SCAs result from ventricular fibrillation (VF). VF is a rapid and unsynchronized heart rhythm that originates in the heartโs lower chambers (the ventricles).
A built-in computer checks heart rhythm through adhesive electrodes. The computer calculates whether defibrillation is need. If it is, a shock button is presse on the AED.
This shock momentarily stuns the heart and stops all activity. AEDs advise a shock only for VF or pulseless ventricular tachycardia (increased heart rate without a pulse originating in the ventricles).
AEDs are safe to use by anyone. Studies show that 90% of the time AEDs cab detect arrhythmias and decide whether to deliver a shock or not.