What is the primary function of the pacemaker lead?

The primary function of the pacemaker lead is to deliver electrical impulses to the heart. This component is crucial in the conduction system of the heart, particularly when there is an issue with the heart’s natural pacemaker, the sinoatrial (SA) node. When natural conduction is disrupted due to conditions such as bradycardia or heart block, the pacemaker lead directly stimulates the myocardial tissue to ensure consistent heartbeat rhythms.

This capability allows the pacemaker to maintain appropriate heart rates and synchronize contractions, enabling effective blood circulation throughout the body. Other options may touch on aspects related to heart function, but their primary focus does not align with the specific function of the pacemaker lead, which is fundamentally about electrical impulse delivery.