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[答] T波是继ST段后一个低而宽、上升支较慢、下降支较快的波。它代表心室复极时的电位变化。T波在等电位线的上方,称为T波直立。T波在等电位线的下方,称为T波倒置。在正常情况下,T波电轴与QRS波群的电轴基本一致。故QRS波群生波向上的导联T波直立,QRS波群主波向下的导联T波倒置。正常人Ⅰ、Ⅱ
[A] T wave is a low and wide after the ST segment, the rising branch is slower, the descending branch faster wave. It represents the ventricular repolarization potential changes. T wave at the top of the equipotential line, called T wave upright. T wave at the bottom of the equipotential line, called T wave inversion. Under normal conditions, the electrical axis of the T wave axis and the QRS complex are basically the same. Therefore, QRS wave group wave upward leads T wave upright, QRS wave group down wave lead T wave inversion. Normal people Ⅰ, Ⅱ