Basic Life Support (BLS) Practice Exam

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Which of the following devices is used to analyze the heart rhythm?

CPR monitor
Stethoscope
AED
Sphygmomanometer

The correct answer is: AED

An Automated External Defibrillator (AED) is specifically designed to analyze the heart's rhythm. It is a critical device used in emergency situations, particularly in cases of cardiac arrest. The AED monitors the electrical activity of the heart and can determine whether a shock is needed to restore a normal rhythm. When the AED is applied to a patient, it automatically assesses whether the heart is in a shockable rhythm, such as ventricular fibrillation or pulseless ventricular tachycardia. If a shock is indicated, the device will prompt the user to deliver a shock, which can help restart the heart or restore a normal rhythm. This function is essential in improving the chances of survival in a cardiac emergency. The other devices listed do not perform the function of analyzing heart rhythm in the way that an AED does. For example, while a CPR monitor may provide feedback during chest compressions, it does not have the capability to analyze rhythms. A stethoscope is used for listening to heart sounds but does not analyze heart rhythms, and a sphygmomanometer measures blood pressure rather than heart rhythm. Thus, the AED stands out as the correct choice for rhythm analysis in this context.