Final answer:
Clients with pacemakers should monitor their pulse rate to track the effectiveness of their device and detect any irregularities that may require medical attention.
Step-by-step explanation:
The client with a pacemaker should be taught to monitor his pulse rate. This is essential because a pacemaker has the critical function of delivering electrical impulses to maintain an appropriate heart rate, particularly when arrhythmias affect the heart's natural ability to keep a consistent rhythm. Sensors in pacemakers detect body motion and breathing to adjust the heart rate during exercise to match the body's demand for blood and oxygen. Monitoring pulse rate allows the client to be aware of their heart rate in various conditions and identify any inconsistencies that might signify a need for pacemaker adjustment or medical evaluation.