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Lower Chronic Stimulation Threshold in the Carbon‐Tip than in the Platinum‐Tip Endocardial Electrode: A Randomized Study
Author(s) -
THUESEN LEIF,
JENSEN PETER JOERN,
VEJBYCHRISTENSEN HANS,
MORTENSEN PETER THOMAS,
THOMSEN POUL ERIK BLOCH
Publication year - 1989
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1989.tb01836.x
Subject(s) - platinum , electrode , medicine , intracardiac injection , stimulation , biomedical engineering , cardiology , chemistry , biochemistry , catalysis
THUESEN, L., et al .: Lower Chronic Stimulation Threshold in the Carbon‐Tip Than in the Platinum‐Tip Endocardial Electrode: A Randomized Study Seventy‐nine patients admitted for VVI pacemaker treatment were randomly given a Siemens‐Elema 412 S endocardial electrode (tip material vitreous carbon, tip area 12 mm 2) (41 patients) or a Siemens‐Elema 415 S endocardial electrode (tip material platinum, tip area 12 mm 2 ) (38 patients). The groups did not differ in age, sex. magnitude of intracardiac signal or indication for pacemaker treatment. Pacing threshold was measured by the vario technique at 3 and 15 months after the implantation. In the group of carbon‐tip electrodes and in the group of platinum‐tip electrodes stimulation thresholds at implantation were 0.49 ± 0.10 V and 0.54 ± 0.14 V(ns), at months 31.40 ± 0.45 V and 1.57 ± 0.53 V(ns), and at months 15 1.12 ± 0.33 V and 1.37 ± 0.38 V(P = 0.003), respectively. After 1 year, 88% of the patients in the carbon‐tip group and 66% (P ‐ 0.04) in the platinum‐tip group fulfilled our criteria for reducing pacemaker output from 5.0 V to 2.5 V. In comparable platinum‐tip and carbon‐tip pacing electrodes, the chronic stimulation threshold was lower in the carbon‐tip than in the platinum‐tip electrode.