Chronic Ventricular Electrograms: Do Steroid-Eluting Leads differ from Conventional Leads?
Version of Record online: 5 OCT 2007
Pacing and Clinical Electrophysiology
Volume 13, Issue 12, pages 1879–1882, December 1990
How to Cite
SCHUCHERT, A., HOPF, M., KUCK, K. H. and BLEIFELD, W. (1990), Chronic Ventricular Electrograms: Do Steroid-Eluting Leads differ from Conventional Leads?. Pacing and Clinical Electrophysiology, 13: 1879–1882. doi: 10.1111/j.1540-8159.1990.tb06908.x
- Issue online: 5 OCT 2007
- Version of Record online: 5 OCT 2007
- steroid-eluting leads;
- R wave amplitude
SCHUCHERT, A., ET AL.: Chronic Ventricular Electrograms: Do Steroid-Eluting Leads differ from Conventional Leads? The aim of steroid-eluting leads is to reduce chronic pacing thresholds. Whether steroid-eluting leads also modify acute and chronic R wave amplitudes as well as R wave sensing of the pulse generator was investigated in 31 patients with a unipolar ventricular pacemaker. Four different leads were implanted: Two steroid-eluting leads with different electrode surface areas (8 mm2 and 5.8 mm2) and two conventional leads (Target Tip, Elgiloy lead). At implantation filtered R wave amplitudes, peak-to-peak values, and slew rates were measured by a pacing system analyzer. One year after implantation R wave amplitudes were directly determined from intracardiac electrograms and compared to the peak-to-peak data at implantation. Additionally, R wave inhibition was evaluated at a sensitivity setting of 5 mV. There were no differences among the four leads in respect to any of the parameters studied at implantation. At follow-up, no differences in R wave amplitudes were found leading to an appropriate sensing in all leads. Steroid-eluting leads did not differ from conventional leads and a smaller electrode surface area of 5.8 mm2 had no influence on ventricular electrogram. Together with a pacemaker with an input impedance of 37 kohms R wave sensing was a correct setting of 5 mV.