Aims Left ventricular (LV) lead implantation is on the increase due to cardiac resynchronization therapy (CRT). However, there has been paucity of data on the prognosis of LV lead.

Methods Consecutive 32 patients with LV lead for CRT (n=20) and pacemaker (n=12) were enrolled. Serial changes in pacing threshold and impedance were evaluated at the time of implantation, 1, 6, 12 and 24 months after the index procedure.

Results Relative value of the threshold voltage rose slightly at 1 month and then decreased slightly over 2 years (110%, 89.6% and 79.6% at 1, 6, and 24 months respectively, p=0.62, Figure). The changing pattern of impedance showed decreasing tendency during the follow-up (p=0.80, Figure). The cumulative rates of lead revision were 6.3% (n=2) and 9.4% (n=3) in 6 month and 2 year follow-up, respectively. One case of phrenic nerve capture at left lateral decubitus position was detected 1 month after the implantation. However, there were no serious complications over the 2 year period.

Conclusion LV lead implantation showed favorable long-term prognosis. Pacing parameters remained stable without significant changes over the 2 year follow-up.