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心电轴是指 Q R S 环在额面投影的综合向量.正常左室壁心肌厚度是右室壁的三倍,因而心室除极的综合向量正常总是指向左心室部位。在额面指向左下方。一.六轴系统1.六轴系统的构成将ⅠⅡⅢ、a V R、aV L,a Y F 六个肢导联的导联轴按几何学的方法平行移位,使每一导联轴的中心点(电偶中心点)互信重叠所构成的图形,称为额面六轴系统,简称六轴系统。每一导联轴从中心点分为正负两半,各轴之间的夹角均为
Cardiac axis refers to Q R S ring in the frontal projection of the integrated vector of normal left ventricular wall thickness is three times the right ventricular wall, and thus the general ventricular depolarization vector is always normal to point to the left ventricular site. Pointing to the bottom left. A six-axis system 1. Six-axis system of the composition of the II Ⅱ Ⅲ, a VR, aV L, a YF six limb lead lead axis parallel to the geometric method of displacement so that the center of each lead axis (Galvanic center) mutual trust and overlap formed by the graphics, known as the frontal six-axis system, referred to as the six-axis system. Each lead shaft is divided into positive and negative halves from the center point, the angle between the axes are