心电图口诀
三速五缓,房前室宽,高梗低缺,室颤乱糟糟
室上无P小于2,三个室早为室速
一延二落三分离,二先看落在看延
左室V5右V1
左肥R波大于五,右肥R/S大于一
左束R波顶平钝,右束V1V2两R波
房肥看P波,高右双左(II导联)
P波高度2.5小格就是心房扩大
右房扩大电压0.25,肺型P波
低电压:心电图高度均<0.5mv(一个小格)
室早无P,提前,QRS波宽大畸形
房早有P,提前
病理性Q波:宽度一个小格,高度同导联R波的四分之一
房颤无P波,V1颤动波
II,III,AVF的P波必须直立
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