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心电图异联是指人体表面心电图电极的安置部位及与心电图机的连接方法。常用的心电图导联有一、双极肢导联(又称标准导联) 双极肢导联的电极安置在四肢,与心电图机的正极端相连者称为正电极,又称探查电极。与心电图机的负极端相连者称为负电极,其具体连接方法如下; Ⅰ导联左上肢接正电极,右上肢接负电极,记录左上肢与右上肢的电位差。当左上肢电位高于右上肢时,描记出一个向上的波;反之,描记出一个向下的波。
Electrocardiogram (ECG) refers to the placement of the human body surface ECG electrodes and the connection method with the ECG machine. Commonly used ECG leads have a bipolar limb lead (also known as the standard lead) bipolar limb lead electrode placed in the limbs, connected with the positive end of the electrocardiograph is called the positive electrode, also known as the probe electrode. The negative electrode connected with the negative terminal of the electrocardiogram machine is called negative electrode, and the specific connection method is as follows; Ⅰ leads the left upper limb connected positive electrode, the right upper limb connected negative electrode, recording the left upper limb and right upper limb potential difference. When the left upper limb potential is higher than the right upper limb, an upward wave is traced; on the contrary, a downward wave is traced.