Figure 4: LBBP for Complete heart block. A – PVCs during LBB lead placement. B – Paced QRS morphology mimicked VES4 with duration of 114ms and pLVAT of 70ms. C – Pacing lead electrogram showing sharp LBB potential (LB Po) preceding the local ventricular electrogram. C – Final 12 lead ECG after RBB delay correction by anodal capture (QRS duration 100ms). His d and p – His distal and proximal electrogram, LBB and LBU – Pacing lead electrogram bipolar and unipolar, RVA – right ventricular electrogram, His Po – His bundle potential