This chapter describes a clinical case of left bundle branch area pacing (LBBAP) in a patient with a narrow intrinsic QRS. Initial attempts were performed using a Medtronic lumenless lead, but penetration into the interventricular septum was insufficient despite adequate sheath support. Owing to suboptimal lead advancement, the strategy was shifted to a stylet-driven lead. The stiffer architecture enabled effective trans-septal engagement, resulting in non-selective left bundle branch capture with characteristic QRS morphology and a clear transition from non-selective to selective LBB capture, confirming true LBB pacing. Electrical parameters remained stable throughout follow-up. This case highlights the technical considerations and procedural decision-making involved when transitioning from lumenless to stylet-driven systems to optimize septal lead deployment during LBBAP.