在记录心电图时遇到的主要问题之一,是不希望在输出中出现60赫芝干扰。本文探讨了许多可能的干扰来源,并对每一种都提供了说明、识别试验方法和消除办法。本文还考察了设备可能的缺陷和放大器设计的指导原则,以帮助对心电图领域内的新发展作出估价。作为例证,还把隔离干扰源的方法应用于展览会表演,以使每一个参观者都能够迅速地看到他自己的心电图。 One of the major problems encountered when recording an ECG is that it does not want 60 Hz interference in the output. This article explores many possible sources of interference and provides explanations for each, identifying test methods, and ways to eliminate them. This article also examines the possible flaws in equipment and guidelines for amplifier design to help assess new developments in the field of electrocardiography. As an illustration, a method of isolating sources of interference is also applied to exhibition performances so that each visitor can quickly see his own electrocardiogram.