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房室延搁
时间：2022-01-01 16:43
关键词：
生理学
医学三基(医师)
心与动脉
基础医学
答案解析
<p> 房室交界区的传导性很低，传导速度缓慢（仅为0.02m/s），兴奋通过房室交界区耗时约0.1s，称为房室延搁。房室延搁的存在具有重要生理意义，它保证心室的收缩发生在心房收缩完毕之后，有利于心室的充盈和射血。</p>
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