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191问答库 > 画图描述正常心电图的波段和间期并说出代表的含义

画图描述正常心电图的波段和间期并说出代表的含义

2025-03-15 13:42:32

推荐回答（1个）

回答1：

P波：心脏的兴奋发源于窦房结，最先传至心房，故心电图各波中最先出现的是代表左右两心房兴奋过程的P波。兴奋在向两心房传播过程中，其心电去极化的综合向量先指向左下肢，然后逐渐转向左上肢。如将各瞬间心房去极的综合向量连结起来，便形成一...dtlz

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