What is the role of a ventricular lead in a pacing system?

The role of a ventricular lead in a pacing system is to pace the ventricle. This lead is specifically designed to deliver electrical impulses to the heart's ventricles when they do not respond adequately to the natural conduction system. The pacing from the ventricular lead ensures that the heart maintains an appropriate rhythm, especially in cases of bradycardia or other conduction abnormalities where ventricular function may be compromised.

By stimulating the ventricles directly, the lead ensures that the ventricles contract and pump blood efficiently, which is critical for maintaining proper circulation throughout the body. This function supports the overall cardiac output and helps alleviate symptoms related to insufficient heart rhythm or function.