Effects of local steroid elution on chronic pacing threshold and impedance of endocardial pacemaker leads.

Abstract:

:To study the effects of steroid elution on chronic pacing threshold and impedance, a 4-mm2 surface area lead with steroid (030-368, Telectronics; n = 9) was compared to the same lead without steroid (030-359, Telectronics; n = 9) 3 months after implantation. The pulse duration thresholds of the steroid lead were significantly lower at 0.8, 1.6, 2.5, and 5.0 V. Impedance measured by telemetry at 0.8, 1.6, 2.5, 5.0 and 8.0 V pulse amplitude, and 0.05, 0.25, 0.5 and 1.0 ms pulse duration was similar for the two leads. Mean impedance was about 650 omega and did not change from 0.8 to 8.0 V. The local steroid elution reduced the pacing threshold, but had no influence on the impedance. The stable impedance indicates that the impedance of this lead was not modified by pulse-dependent variables and, therefore, can also be correctly determined at pulse amplitudes below 5.0 V.

journal_name

Cardiology

journal_title

Cardiology

authors

Schuchert A,Kuck KH

doi

10.1159/000175976

subject

Has Abstract

pub_date

1993-01-01 00:00:00

pages

240-3

issue

4

eissn

0008-6312

issn

1421-9751

journal_volume

83

pub_type

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