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- W65643126 abstract "To evaluate cardiac pacing thresholds and the safety of a 2.5 V amplitude setting, we prospectively studied 29 pediatric patients during a mean follow-up of 16.4 months. Exit block (EB) at 2.5 V was confirmed during threshold analysis in 26% of 58 leads. No new cases were detected by threshold analysis after 20 weeks postimplantation. Exit block at 2.5 V occurred 4 times more frequently with ventricular than with atrial leads (39% vs 8%) and 11 times more frequently with epicardial than with endocardial leads (47% vs 4%). There was no relationship between intraoperative thresholds and EB during follow-up pacemaker checkups. The mean pulse width threshold (PWT) for endocardial ventricular leads was lower for steroid-tip than for non-steroid-tip leads (0.08 + 0.01 msec vs 0.28 + 0.04 msec). Exit block did not occur with steroid-tip leads. We conclude that during the first 20 weeks after implantation, a 2.5 V amplitude is not safe in children paced by means of nonsteroid epicardial ventricular leads. Our approach to pacing in children includes (1) 5.0 V amplitude for epicardial leads during the first 20 weeks after implantation and (2) use of endocardial steroid-tip leads whenever possible." @default.
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- W65643126 date "1993-07-01" @default.
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- W65643126 title "Cardiac Pacing Problems in Infants and Children: Results of a 4-Year Prospective Study" @default.
- W65643126 doi "https://doi.org/10.1097/00007611-199307000-00014" @default.
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