Which describes an electrical device for stimulating or steadying the heartbeat?

• A. Pulse
• B. Pacemaker
• C. Sphygmomanometer
• D. Cholesterol

Answer: (B)

A pacemaker is an implanted electronic device that provides electrical impulses to the heart to keep its rhythm steady when the heart’s natural electrical system isn’t working properly. It can sense the heart’s activity and deliver pacing as needed, sometimes coordinating pacing of the atria and ventricles and adjusting the rate with activity. The term pulse refers to the actual heartbeat you can feel, not a device. A sphygmomanometer measures blood pressure, and cholesterol is a lipid involved in cardiovascular risk, not a device for regulating heart rhythm.