Explain the use of an AED.

• A. To deliver a shock to the heart regardless of rhythm
• B. To analyze heart rhythm and deliver a shock if advised
• C. To monitor blood pressure and inject medication
• D. To provide respiratory support only

Answer: (B)

An AED’s main function is to analyze the heart’s rhythm and deliver a defibrillation shock only when the device determines the rhythm is appropriate to shock. After applying the pads and turning it on, the device analyzes the rhythm and will prompt a shock if it detects a rhythm that is considered shockable, such as ventricular fibrillation or pulseless ventricular tachycardia. If the rhythm isn’t shockable or a pulse is present, it guides you to continue CPR and reassess. It does not monitor blood pressure, inject medications, or provide respiratory support; its role is to restore a normal rhythm by delivering a shock when indicated by its analysis.