Final answer:
An AED may deliver shocks followed by at least 2 minutes of CPR to save a person experiencing ventricular fibrillation during a heart attack.
Step-by-step explanation:
In the event of a cardiac emergency, an automated external defibrillator (AED) may deliver one or more shocks, followed by at least 2 minutes of CPR (cardiopulmonary resuscitation). This sequence can be critical in saving a life when a person experiences a heart attack due to ventricular fibrillation, an irregular and fast heart rhythm. Proper AED usage involves the device analyzing the patient's heart rhythm and, if necessary, administering a shock with the appropriate energy and waveform to reset the heart's rhythm.
Afterward, immediate CPR is essential to maintain blood circulation until the heart can effectively pump blood on its own. AEDs are often found in public places and are designed for use by laypersons, with voice prompts to guide the rescuer.