新型经静脉临时心脏起搏电极的研制与实验应用

我院应用永久性心内膜电极材料和生产工艺研制出带指引钢丝的临时经静脉螺旋式多层微粒铱镀复电极(简称A电极 )。随后采用自身对照设计 ,在 2 4只犬身上按随机顺序先后给予以 3种不同的电极经静脉临时起搏 ,比较其起搏参数的差异 ,了解A电极对起搏和感知功能的影响。结果 :A电极的起搏阈值分别较本院研制的经静脉螺旋式电极 (简称B电极 )及经静脉普通电极 (简称C电极 )降低 30 .30 %和 43.2 1% ,右室心内膜R波振幅分别较B及C电极升高 16 .78%和 2 8.2 9%。结论 :A电极能降低极化效应 ,从而降低了起搏阈值 ,提高了电极的感知性能

Experiment of New Typ e of Electrode for Temporary Transvenous Cardiac Pacing

The purpose of this report is to present the result of installation of temporary cardiac pacing to the dogs with transvenous fractal lead designed by our hospital.Self control research was adopted in 24 adult mongrel dogs.Three temporary pacing electrodes were performed at random,compared their difference of parameters.The group of transvenous fractal screw electrode showed a decrement of 30.30% and 43.21% of stimulation threshold comparing to the group of transvenous ordinary screw electrode and transvenous ordinary electrode.The group of transvenous fractal screw electrode showed a increase of 16.78% and 28.29% of intrinsic deflection amplitude comparing to the group of transvenous ordinary screw electrode and transvenous ordinary electrode.By diminishing polarization,the pacing of threshold of fractal electrode is significantly lower than those of reference electrodes.Fractally coating enlarges the active surface of the electrode more than 1000 folds and provides long term stable leads due to their electrical properties,so it can enhance the sensation of the lead.