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一、什么叫起搏器磁铁试验,有何意义?答:目前临床上应用最广泛的起搏器为 R 波抑制型起搏器.它的特点是当病人的自身心率超过起搏频率时,便能通过自身的 R 波来抑制起搏脉冲的发放,这样可避免引起竞争心律,故又称按需型起搏器.当起搏脉冲长时间被抑制后,临床上就无法判断起搏器的功能.为此,特地为 R 波抑制型起搏器设计了一种磁铁试验.其方法是用一块永久磁铁直接放在病人安置起搏器囊袋的胸壁上,通过磁场的作用,使起搏器电路中的干簧开关吸合,起搏器便由按需型暂时转换成固定频率型.这样起搏脉冲就可不受自身心率的影响而按其规定的频率发放,经心电图记录下来后就可供分析.因为所设计的此种起搏器的固定频率往往比起
First, what is the meaning of pacemaker magnet test? A: At present, the most widely used pacemaker for clinical R-wave inhibition of pacemaker.It is characterized by the patient’s own heart rate exceeds the pacing frequency, Can inhibit the release of pacing pulses through its own R wave, so as to avoid competition rhythm, it is also called on-demand pacemaker.When the pacing pulse is suppressed for a long time, it is clinically impossible to judge the pacemaker To this end, specifically designed for the R-wave inhibition of a pacemaker magnet test method is to use a permanent magnet placed directly on the chest wall of patients with pacemaker pockets, through the role of the magnetic field Pacemaker circuit in the reed switch pull, the pacemaker by on-demand temporarily converted to a fixed frequency type so that the pacemaker pulse can be free from the impact of their own heart rate according to the provisions of the frequency distribution, the electrocardiogram recorded Can be analyzed, because the design of this pacemaker fixed frequency is often compared