Ideal lead for LBBAP:
Although SD leads with extendable helix may offer some advantages in
terms of steerability and septum penetration, the fragility of the
screwing mechanism requires great precaution during repositioning and
raises concerns regarding long-term extractability. In our opinion,
ideal leads for LBBAP should combine a robust SD isodiametric narrow
caliber design with an exposed active helix fixation.