Certified Biomedical Equipment Technician (CBET) Practice Exam

A pacemaker is a medical device specifically designed to regulate the heart's rhythm. It is used primarily in patients whose hearts beat too slowly (bradycardia) or have an irregular heartbeat (arrhythmia). By emitting electrical impulses, the pacemaker prompts the heart to beat at a normal rate, ensuring that the body receives an adequate supply of oxygen-rich blood.

The other options listed do not pertain to the specific function of a pacemaker. Monitoring blood pressure involves devices that measure the pressure exerted by circulating blood on the walls of blood vessels, but it does not control the heartbeat. Delivering anesthesia is a function performed through specialized machines that administer medications to prevent pain during surgical procedures. Providing oxygen therapy involves using devices to deliver supplemental oxygen to patients who have difficulty breathing or low oxygen levels in their blood, which is also unrelated to the heart's electrical activity. Thus, the primary and correct role of a pacemaker is to regulate heartbeat.