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体表心电图缺血性J波的机制与临床意义 被引量:6

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摘要 正常情况下,心室肌除极方向由心内膜面向心外膜面进行,复极时由于受压力和温度等因素的影响,由心外膜面向心内膜面进行,结果后除极的心肌反而先复极。最后除极和最早复极的过程存在一定的过渡区,持续时间约10ms,这在体表心电图上表现为QRS波群与ST段交界处的一个突发性转折点,即J点。J点通常位于基线水平,标志着心室除极的结束和复极的开始。1953年Osborn研究表明,某些生理或病理情况下,过渡区增宽,即出现J点从基线偏移,
出处 《中华老年心脑血管病杂志》 CAS 北大核心 2011年第10期943-945,共3页 Chinese Journal of Geriatric Heart,Brain and Vessel Diseases
作者简介 通讯作者:周玉杰,Email:jackydang@163.com
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