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High Impedance Low Energy Pacing Leads: Long‐Term Results With a Very Small Surface Area Steroid‐Eluting Lead Compared to Three Conventional Electrodes
Author(s) -
MORACCHINI PIER VITTORIO,
CORNACCHIA DANIELE,
BERNASCONI MARCO,
TESORIERI MARIA CRISTINA,
FABBRI MAURO,
MARZEGALLI MAURIZIO,
BARALDI PAOLO,
CORTE TIZIANO,
GIULIANI MAURO,
MAROTTA TIZIANA,
SETA FRANCESCO
Publication year - 1999
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.1540-8159.1999.tb00446.x
Subject(s) - medicine , urology , lead (geology) , implant , nuclear medicine , surgery , geology , geomorphology
We evaluated the handling performance at implant, and the long‐term atrial and ventricular electrical performance of a new generation using a very small surface area (1.2 mm 2 ) steroid‐eluting electrode (Medtronic CapSure Z). We compared the performance of CapSure Z to that of traditional passive fixation leads, with and without steroid elution. The study was conducted during 2 years of follow‐up. We studied 188 patients (105 males and 83 females; mean age 71 ± 7 years). All of the patients were implanted with a dual chamber pacemaker and the same type of lead in both chambers. Forty‐one patients received CapSure Z leads, 25 patients received Target Tip leads (8‐mm 2 surface area; no steroid elution), 63 patients received CapSure leads (8‐mm 2 surface area; steroid elution), and 59 patients received CapSure SP leads (5.8‐mm 2 surface area; steroid elution). The four groups were homogeneous in regards to sex, age, cardiac disease, and reason for implant.At follow‐up, the CapSure Z lead showed sensing values comparable to the other leads, with lower pacing thresholds and higher pacing impedance in both chambers. We evaluated the mean current drained from the pacemaker by the different types of leads when using safe, low energy output settings. We found that by using CapSure Z leads, the mean current was significantly lower than that of the other types of leads (0.42 μA for CapSure Z ventricular lead vs 0.85 for CapSure SP, 1.42 for CapSure, and 1.54 for Target Tip). Thus, the use of the CapSure Z lead, combined with low energy output programming, will increase pacemaker longevity compared to the use of traditional leads and standard output programming.