Final answer:
An AED is needed to provide a potentially lifesaving electric shock to the heart during a cardiac emergency such as ventricular fibrillation. It uses an ECG to diagnose heart rhythm and is designed to be simple for anyone to use. AEDs are now commonly available in many public spaces and are critical for immediate first aid.
Step-by-step explanation:
Automated external defibrillators (AEDs) are critical in treating sudden cardiac emergencies. These portable devices are used to administer an electric shock to the heart in cases of life-threatening arrhythmias like ventricular fibrillation, where the heart beats rapidly and irregularly.
An AED is equipped with an electrocardiogram (ECG) to analyze the patient's heart rhythm and deliver the shock with the appropriate energy level. This treatment can terminate the arrhythmia and allow the natural pacemaker of the heart to restore a normal rhythm.
Due to their simplicity and effectiveness, AEDs are commonly found in public places and are easy to use by laypersons. Cardiopulmonary resuscitation (CPR) is often recommended before using an AED. Public access to AEDs is important because they provide verbal instructions and can be used within the crucial first few minutes following a cardiac event to increase the chances of survival.