What device is used to restore normal heart rhythms in victims of sudden cardiac arrest?

The device used to restore normal heart rhythms in victims of sudden cardiac arrest is the Automated External Defibrillator (AED). AEDs are designed to be user-friendly and can be operated by individuals with minimal training. They analyze the heart's rhythm and, if necessary, deliver an electric shock to the heart to help re-establish an effective rhythm. This process is critical in cases of ventricular fibrillation and pulseless ventricular tachycardia, which are common life-threatening arrhythmias that occur during sudden cardiac arrest.

The AED's technology allows it to provide verbal prompts and visual instructions, making it accessible for bystanders to use in emergency situations. Quick access to an AED and the application of defibrillation within minutes can significantly increase a patient's chances of survival.

Other devices mentioned, such as the cardiac monitor and manual defibrillator, while important in cardiac care, are typically used by healthcare professionals in clinical settings rather than in bystander scenarios. The heart rate analyzer is not designed to deliver defibrillation and therefore does not serve the same lifesaving function as an AED.