| Autor: |
Campbell, Robert M., Raviele, Anthony A., Hulse, Eddie J., Auld, Debbie O., McRae, Guyler J., Tam, Vincent K. H., Kanter, Kirk R. |
| Předmět: |
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| Zdroj: |
Pacing & Clinical Electrophysiology; Aug1999, Vol. 22 Issue 8, p1152-1157, 6p, 1 Chart |
| Abstrakt: |
Continued miniaturization of permanent pacing systems has promoted use of this technology in younger and smaller pediatric patients. Intermedics ThinLine 438-10 active fixation pacing leads (4.5 Fr lead body) were implanted in 26 patients (17 males/9 females; 9.9 ± 6.9 years). Twenty of 26 patients received dual chamber systems, 6 of 26 patients single lead systems. Each patient has been followed³ months. Pacemaker analysis at implant and 6 months later evaluated pulse width thresholds at 2.5 V (atrial 0.07 ± 0.02 vs 0.13 ± 0.02 ms [P = 0.01]; ventricular 0.08 ± 0.04 ms vs K20 ± 0.04 ms [P = 0.01]); sensing thresholds (atrial 4.1 ± 0.41 mV vs 4.0 ± 4.2 mV [P = NS]; ventricular 9.7 ± 0.72 vs 9.3 ± 0.94 mV [P = NS]): and impedance (atrial 345 ± 12 vs 370 ± 120 O [P = 0.04]; ventricular 412 ± 17 vs 458 ± 190 O [P < 0.01]). One volt lead failed with exit block at approximate]y 6 weeks. The youngest (9 months to 5 years) and smallest (6.5-18.0 kg) ten patients have each shown by venography to have at least mild venous stenosis at the lead(s) insertion site; five patients demonstrated collateral formation around asymptomatic obstruction, with no thrombus formation. The Intermedics 438-10 ThinLine pacing lead has demonstrated good and stable early postimplant electrical parameters. Angiographic evaluation in our smaller patients has shown evidence for asymptomatic venous obstruction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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