十八导联动态心电图是指在常规十二导联心电图Ⅰ、Ⅱ、Ⅲ、avR、avL、avF、V1、V2、V3、V4、V5、V6导联基础上，以心脏横面胸导联的延伸作为理论根据，扩展出向左、向右各三个导联，从而形成由六个肢体导联、十二个胸前导联共同组成的同步十八导联心电图系统。-18 lead Holter on the basis of the conventional twelve-lead ECG I, II, III, in avR, avL, avF, the V1 and V2, V3, V4, V5, and V6 leads, the precordial heart horizontal surface an extension as the theoretical basis for expansion of the left, all three lead to the right, thus forming the synchronization by the six limb leads, 12 precordial 18-lead ECG system.