What is the primary function of a pacemaker?

• A. To remove a tumor
• B. To stimulate heartbeats
• C. To replace a heart valve
• D. To monitor blood pressure

Answer: (B)

The primary function of a pacemaker is to stimulate heartbeats. A pacemaker is a small medical device that delivers electrical impulses to the heart to maintain a regular heartbeat. It is commonly used in patients whose natural heart rhythm is irregular or too slow, a condition known as bradycardia. By providing these electrical signals, the pacemaker ensures that the heart beats at a sufficient rate to meet the body’s needs, thereby improving cardiac output and preventing symptoms associated with a slow heart rate, such as fatigue, dizziness, or fainting.

The other options focus on different functions that are not related to the primary role of a pacemaker. Tumor removal pertains to surgical procedures aimed at excising abnormal tissue. Heart valve replacement involves surgical intervention to replace a damaged heart valve. Monitoring blood pressure is a diagnostic function that helps assess cardiovascular health but does not include stimulating heart rhythms.