Arai Y, Yamazoe M, Toeda T, Hoshino Y, Shibata A, Makino H, Saitoh Y
Pacing Clin Electrophysiol. 1984 Sep;7(5):778-83. doi: 10.1111/j.1540-8159.1984.tb05616.x.
The optimal amplitude and slew rate of intracardiac electrograms for pacemaker sensing were examined on a theoretical basis by computer simulation. The simulation was based on the concept that it is the voltage at the position of the pacing electrode in an electrical field of a moving electrical dipole. By changing the distance between the electrode and the myocardium and the moving velocity of the electrical dipole, simulated ECGs with arbitrary amplitudes and slew rates were generated by the computer and fed to a bandpass filter. This filter was equivalent to those assembled in some models of permanent pacemakers and had a center pass-band frequency of 50 Hz and a Q of 1.0. The outputs of the filter were measured. The results showed that, for pacemakers sensing, simulated intracardiac electrograms with high amplitude should have high slew rates and those with low amplitudes should have low slew rates, although the absolute values depend on the characteristics of the bandpass filter and the sensing threshold of the pacemaker.
通过计算机模拟从理论基础上研究了用于起搏器感知的心内电图的最佳幅度和转换速率。该模拟基于这样一个概念，即在移动电偶极子的电场中，起搏电极位置处的电压起作用。通过改变电极与心肌之间的距离以及电偶极子的移动速度，计算机生成具有任意幅度和转换速率的模拟心电图，并将其输入到带通滤波器。该滤波器等同于一些永久起搏器型号中组装的滤波器，中心通带频率为50Hz，Q值为1.0。测量滤波器的输出。结果表明，对于起搏器感知，高幅度的模拟心内电图应具有高转换速率，低幅度的模拟心内电图应具有低转换速率，尽管绝对值取决于带通滤波器的特性和起搏器的感知阈值。
