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一、基本结构心脏激动时会产生电位并传遍人体.把两个和伏特计相连的金属电极放在离心脏不同距离的任两点上就可以测出一定的电位差或相应的电流变化.心电图机实质上就是个特殊的伏特计,它所测绘的正是心脏电位变化的曲线(图1).医生根据各个波的形状、振幅持续时间和振幅大小等测量、计算结果来诊断疾病.电极位置不同所得曲线显然不同.经验证明,从某些对应点上测得的心电图对诊断疾病最有效,并相应称为各
First, the basic structure of the heart when excited will produce potential and spread throughout the body. The two metal electrodes connected to the voltmeter on the heart at any two points from different distances can be measured at a certain potential difference or the corresponding changes in current. Machine is essentially a special voltmeter, it is mapping is the change of the heart potential curve (Figure 1) .The doctor according to the shape of each wave, the amplitude of the duration and amplitude measurement, calculate the results to diagnose the disease. Obviously different curves obtained.Experience has shown that measured from some of the corresponding ECG on the most effective diagnosis of disease, and are called each