What leads are included in the HB/LB-Pacer configuration?

The correct choice indicates that the HB/LB-Pacer configuration consists of a His bundle lead and a right atrial lead. This configuration targets pacing from the His bundle (HB), which is part of the heart’s conduction system, ensuring that electrical impulses are delivered in a way that enhances the natural rhythm.

Pacing through the His bundle allows for more physiological conduction compared to traditional ventricular pacing, as it helps to maintain synchrony between the atria and ventricles by pacing close to where the natural conduction occurs. The inclusion of the right atrial lead allows for effective capture of the atrial myocardium, ensuring coordinated atrial contraction, which is essential for optimal cardiac output.

Thus, the HB/LB-Pacer configuration effectively facilitates pacing while preserving the integrity of the heart's natural conduction pathways by utilizing both the His bundle and the right atrial lead. This is significant in maintaining a more natural and synchronized heart rhythm. Other combinations provided do not encompass the required leads for this specific pacing strategy.