What is the potential outcome of oversensing in pacing systems?

Oversensing in pacing systems occurs when the device misinterprets non-cardiac signals as genuine cardiac events, leading to inappropriate responses. When oversensing happens, the pacemaker may not detect the actual depolarization events that require pacing. As a result, it fails to deliver the necessary pacing stimuli, which is categorized as underpacing. The device's inability to recognize these critical signals can result in missed heartbeats, allowing the patient's heart to slow down or fail to maintain an adequate rate, leading to potential symptoms of bradycardia or other complications.

Understanding this concept is crucial for ensuring the device functions correctly and maintains appropriate heart rates. It highlights the importance of proper device programming and lead placement to avoid such complications during pacing therapy.