摘要
对３３例植入心房电极者进行起搏阈值的随访，结果表明：起搏阈值峰值为１．４４±０．７４Ｖ／０．５ｍｓ，出现在植入后两周内；慢性期起搏阈值为１．２２±０．４０Ｖ／０．５ｍｓ；伴器质性心脏病患者慢性期起搏阈值（１．７０士０．３７Ｖ／０．５ｍｓ）明显高于不伴器质性心脏病者（１．１６±０．３７Ｖ／０．５ｍｓ），Ｐ＜０．０１；激素电极的起搏阈值峰值（１．１２±０．２９Ｖ／０．５ｍｓ）和慢性期起搏阈值（０．７７±０．１７Ｖ／０．５ｍｓ）均显著低于非激素电极（１．８０±０．６８Ｖ／０．５ｍｓ和１．４０±０．３３Ｖ／０．５ｍｓ），Ｐ＜０．０５及０．００１。提出在非特殊情况下，将出厂时的电能由５．０Ｖ／０．５ｍｓ降至２．５Ｖ／０．５ｍｓ既可保证有效起搏，又可节省电能，从而延长起搏器的使用寿命。
Follow-up results of pacing threshold were analyzed in 33 patients with atrial pacing electrode. The peak pacing threshold(1. 44±0. 74 V/0. 5 ms) occurred in the first two weeks after implantation, The chronic pacing threshold(1. 22±0. 40 V/0. 5 ms) was not related to the parameters measured at implantation. The chronic pacing threshold was significantly higher in the patients with organic heart disease(1. 70±0. 37 V/0. 5 ms)than it in the patients without organic heart disease (1. 16±0.37 V/0.5mg,P<0. 01). Steroid eluting electrode showed a significantly lower peak pacing threshold(1. 12±0. 29 V/0. 5 ms) and chronic pacing threshold(0. 77±0. 17 V/0. 5 ms) than the nonsteroid electrode (1. 80±0. 68 V/0. 5 ms and 1. 40±0. 33 V/0. 5 ms respectively). Normally, it can economize electric energy and provide effectively pacing weanwhile that decreasing a pacemaker's electric power from 5.0V/0. 5 ms to 2.5V/0.5ms when it is produced.
关键词
心脏起搏器
心房起搏
电极
起搏
起搏阈值
Cardiac pacing, artificial
Atrial pacing, Electrode, pacing
Pacing threshold
