What is the primary purpose of a defibrillator?

The primary purpose of a defibrillator is to restore normal heart rhythm. A defibrillator delivers an electrical shock to the heart in cases of life-threatening arrhythmias, such as ventricular fibrillation or pulseless ventricular tachycardia. These conditions occur when the heart's electrical system malfunctions, causing the heart to beat irregularly and preventing it from effectively pumping blood. By delivering a controlled shock, the defibrillator aims to reset the heart's electrical activity, allowing it to resume a normal rhythm and function.

Other options like measuring pulse, monitoring blood pressure, or administering medication are not functions of a defibrillator. These tasks are typically performed by other medical devices or healthcare procedures. Understanding the specific role of a defibrillator is essential for effective emergency response and patient care in critical situations.