Figure 5.

(A) Connection setup for CSP (modified, with permission, from Medtronic). (B) Screen setup with the 12-lead ECG and intracardiac electrogram recorded at 100 mm/s sweep speed during LBBAP implantation, with a filtered 30–500 Hz channel (cyan) and unfiltered 0.5–500 Hz channel (green). V1 and V6 are coloured in yellow to be distinguished from the other leads to facilitate analysis in real time. Note the COI in the unfiltered channel, and transition from non-selective to selective LBBP (last two cycles) with changes in ECG and EGM morphology. CSP F = conduction system pacing, filtered; CSP NF = conduction system pacing, non-filtered.