普遍热笔式心电图机的频率响应很低,只能记录下100赫以内的低频成份,曲线上许多细小的高频成份则因衰减而不能记录下来。采用频率响应较宽的示波器,可以把1000赫以上的高频成份充分显示并通过摄影记录下来。发现心电图上的高频成份“切迹”(noteh)或“扭结’(slur)至今已40余年,目前多数人仍以切迹、扭结报告心电图的高频成份, Popular hot pen-type electrocardiogram frequency response is very low, only to record the low frequency components within 100 Hz, the curve of many small high-frequency components due to attenuation can not be recorded. With a wide frequency response oscilloscope, you can fully display the high-frequency components above 1000 Hz and record it by taking pictures. It has been more than 40 years since it was discovered that the high-frequency component of the electrocardiogram ”noteh“ or ”slur" (slur) has so far been reported. Most people still report the high frequency components of the electrocardiogram with a notch,