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首页> 外文期刊>Indian heart journal >Choice of an alternative lead for QT interval measurement in serial ECGs when Lead II is not suitable for analysis
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Choice of an alternative lead for QT interval measurement in serial ECGs when Lead II is not suitable for analysis

机译：当Lead II不适合分析时，选择用于串联ECG中QT间隔测量的替代引线

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Introduction: Conventionally, QT interval is measured in lead II. There are no data to select an alternative lead for QT measurement when it cannot be measured in Lead II for any reason. Methods and results: We retrospectively analyzed ECGs from 1906 healthy volunteers from 41 phase I studies. QT interval was measured on the median beat in all 12 leads. The mean difference in QT interval between lead aVR and in Lead II was the least, followed by aVF, V5, V6 and V4; lead aVL had maximum difference. The T wave was flat (<0.1 mV) in Lead II in 6.9% of ECGs; it was also flat in 20% of these ECGs (1.4% of all ECGs) in Leads aVR, aVF and V5. Conclusions: When QT interval cannot be measured in Lead II, the best alternative leads are aVR, aVF, V5, V6 and V4 in that sequence. It differs maximally from that in Lead II in Lead aVL.
机译：简介：按照惯例，QT间隔是在导联II中测量的。当由于某种原因无法在Lead II中进行测量时，没有数据可以选择用于QT测量的替代引线。方法和结果：我们回顾性分析了来自41项I期研究的1906名健康志愿者的心电图。 QT间隔是根据所有12条导联的中位搏动测量的。铅aVR和铅II之间QT间隔的平均差异最小，其次是aVF，V5，V6和V4。铅aVL具有最大差异。在6.9％的ECG中，铅II中的T波平坦（<0.1 mV）;在Leads aVR，aVF和V5中，这些ECG中的20％（占所有ECG的1.4％）也持平。结论：当无法通过Lead II测量QT间隔时，最佳替代引线是该序列中的aVR，aVF，V5，V6和V4。它与Lead aVL中的Lead II最大不同。

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