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正常心电向量图横面上,最大QRS向量一般在-10±20°,位于X轴前的QRS面积不应大于总面积的1/3。多年来,使人困惑的问题是,QRS环体前移的发生率甚高,往往造成诊断上的困难。
On the normal ECG vector plot, the maximum QRS vector is typically -10 ± 20 ° and the QRS area in front of the X-axis should not be greater than 1/3 of the total area. The puzzling problem over the years has been the high incidence of QRS annulus anterior move, often causing diagnostic difficulties.