What is the primary function of an AED device?

• A. To increase heart rate.
• B. To assist with breathing.
• C. To restore a regular heart rhythm.
• D. To perform chest compression.

Answer: (C)

Verified step by step guidance

1. Step 1: Understand what an AED (Automated External Defibrillator) is — it is a medical device used in emergencies involving cardiac arrest.
2. Step 2: Recognize that the heart can sometimes develop an irregular rhythm, such as ventricular fibrillation, which prevents it from pumping blood effectively.
3. Step 3: Know that the primary function of an AED is to analyze the heart's rhythm and deliver an electric shock if necessary to correct this irregular rhythm.
4. Step 4: This electric shock helps to 'reset' the heart's electrical system, allowing it to restore a normal, regular heartbeat.
5. Step 5: Differentiate this function from other options like increasing heart rate, assisting with breathing, or performing chest compressions, which are not the primary roles of an AED.