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ST节段(ST segment)又称ST段,为心电图学术语,表示QRS复合波至T波之间的间期,一般介于 0.005 至 0.150 秒之间(5 至 150 毫秒)。
ST节段始于J点(即QRS复合波的终点),结束于T波的起始点。高度则必须参照PR节段以及TP节段的高度。本节段所象征的意义为心室完成去极化至再极化之间的等电位期。
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