What is the main purpose of using an automated external defibrillator (AED)?

The primary function of an automated external defibrillator (AED) is to restore a normal heart rhythm in individuals experiencing sudden cardiac arrest. When the heart enters a state of arrhythmia, particularly ventricular fibrillation or pulseless ventricular tachycardia, the AED delivers an electric shock to the heart. This shock aims to reset the heart's electrical activity, allowing it to re-establish a normal rhythm. The timely use of an AED can significantly improve the chances of survival for someone in cardiac arrest, as it is critical to intervene quickly in these situations.

While diagnosing heart conditions, assisting with CPR, and monitoring vital signs are important aspects of emergency care, they do not align with the specific and primary purpose of an AED. It does not diagnose conditions, provide direct CPR assistance like chest compressions, or monitor blood pressure, which are roles fulfilled by other medical devices and procedures. Thus, the capability of the AED to deliver life-saving defibrillation when the heart malfunctions is what makes it an essential tool in emergency cardiac situations.