Emergency Medical Technician (EMT) Intermediate Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The primary purpose of an Automated External Defibrillator (AED) during an emergency situation is to analyze the cardiac rhythm and provide defibrillation. In cases of sudden cardiac arrest, the heart may be in a rhythm that is not effectively pumping blood (such as ventricular fibrillation or pulseless ventricular tachycardia). An AED is designed to quickly assess the patient's heart rhythm and determine whether a shock is needed to restore a normal heartbeat.

If the AED indicates that a shock is advised, it delivers a controlled electric shock to the heart, which can help reset the heart's electrical system, potentially allowing it to regain a proper rhythm and resume effective circulation. The intuitive design of an AED allows even untrained bystanders to use it confidently in emergencies, making it a critical tool in the chain of survival for cardiac arrest.

While providing oxygen, performing automated CPR, or assessing blood pressure are all important components of emergency care, they are not the principal functions of an AED. The device's critical role is specifically related to its ability to analyze heart rhythms and deliver defibrillation as necessary.