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Lookup NU author(s): Emeritus Professor Alan MurrayORCiD
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A double-blind randomized study of three pacing leads, identical in all ways except for the surface of their electrodes, is presented. The leads were implanted in 30 patients. Ten patients (Group A) received a standard Laserdish lead (dish electrode with laser pores), 10 patients (Group B) received a platinum-iridium coated modified Laserdish electrode, and 10 patients (Group C) received a platinum-iridium coated dish electrode identical to that in Group B except for the absence of laser pores. All leads were implanted by the same operator via the subclavian vein and all patients received an Optima MPT pulse generator. Direct measurement at implantation of pacing threshold and endocardial electrograms showed no significant difference between the three groups (mean +/- standard deviation voltage thresholds 0.30 +/- 0.06 V at 0.5 ms and 0.21 +/- 0.05 V at 1.0-ms pulse durations, R wave amplitude 7.6 +/- 3.2 mV). Significant differences (P = 0.001) were found in threshold impedances at implant (Group A 940 Ohm, Group B 782 Ohm, Group C 673 Ohm). Ten further measurements of voltage threshold were made over the next 2 years. Overall, at a pulse duration of 1.0 ms, a significantly reduced (P
Author(s): Murray A, Jameson S, Gold RG
Publication type: Article
Publication status: Published
Journal: PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY
Year: 1995
Volume: 18
Issue: 12
Pages: 2150-2154
Print publication date: 01/12/1995
ISSN (print):
ISSN (electronic):
