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理论上,心电图导联轴的正极与负极分别记录的图形应当呈镜像表现(Mirror Image)。因此,在相互背离近似180°的不同导联,记录的心电图图形近似镜像,而称为镜像导联。镜像导联的ST-T改变对心肌缺血与梗死的诊断和定位有着重要意义。[定义及机制]镜像导联是指在心脏同一平面上相互背离接近180°的导联,例如心脏额面的III导联与a VL(I)导联相差150°,而横面(水平面)的V_1与V_7~V_9导联背离角度接近180°,镜像导联记录的QRS-ST-T
Theoretically, the images recorded by the positive and negative electrodes of the ECG lead axis should be Mirror Image. Therefore, the electrocardiogram recorded is approximately a mirror image of a different lead that is approximately 180 ° away from each other, and is referred to as a mirror lead. The change of ST-T in the mirror lead is of great significance for the diagnosis and localization of myocardial ischemia and infarction. [Definition and Mechanism] The mirrored lead refers to the lead that is nearly 180 ° away from each other on the same plane of the heart. For example, the lead III of the frontal plane differs from the lead of a VL (I) by 150 °, while the horizontal (horizontal) Of V_1 and V_7 ~ V_9 lead away from the angle close to 180 °, recorded by the mirror lead QRS-ST-T