What is the primary function of the leads in a cardiac pacing system?

The primary function of the leads in a cardiac pacing system is to deliver electrical impulses from the implantable pulse generator (IPG) to the heart. These leads are essential components in the pacing system, as they facilitate the transmission of signals that stimulate the heart to contract, promoting a normal heart rhythm. Specifically, the leads are designed to be placed directly within or on the heart muscle or the cardiovascular system, ensuring that the electrical signals produced by the pacemaker effectively reach the heart tissue.

In this context, the leads not only provide the necessary electrical connection but also play a critical role in sensing the heart's activity and potentially delivering feedback to the IPG. By ensuring that stimulation occurs at appropriate times based on the heart's intrinsic activity, the leads help maintain a consistent and effective cardiac rhythm.

Other options, while they may seem related to the overall function of a pacing system, do not accurately describe the primary role of the leads. For instance, leads do not deliver impulses to the pacemaker itself, monitor blood pressure, or have a direct role in regulating battery life. These functions are typically associated with other components of the pacing system or its operational capabilities.