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Assessment of Long‐Term Stability of Chronic Ventricular Pacing Thresholds in Steroid‐Eluting Electrodes
Author(s) -
STOJANOV PETAR,
DJORDJEVIĆ MILAN,
VELIMIROVIĆ DU?AN,
BELKIĆ KAREN
Publication year - 1992
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.1540-8159.1992.tb02912.x
Subject(s) - medicine , cardiology , ventricular pacing , heart failure
Sixteen patients with Medtronic 4003 steroid‐eluting electrodes implanted in the ventricular position were followed over 5 years. In each patient a special type of Medtronic 2443 pacemaker was implanted to allow programming of output at 1.35 V. Chronic threshold values in these patients measured at an output of 1,35 V were stable over the first 18 months of follow‐up. Mean values were: 0.06 ± 0.03 msec at 6 months and 0.08 ± 0.02 msec at 18 months; these did not differ from each other significantly. However, during the period from 18 to 36 months postimplantation, a significant increase in mean pacing threshold was observed: 0.08 ± 0.02 msec at 18 months postimplantation versus 0.14 ± 0.05 msec at 36 months (P < 0.01), After 36 months, the chronic pacing threshold remained stable until the end of the 5‐year follow‐up period. Further long‐term study of chronic threshold behavior of steroid‐eluting electrodes measured at low amplitudes is warranted.