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首页> 外文会议>Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE >QT measurement for TU fused ECG morphology as exhibited during hypoglycaemia
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QT measurement for TU fused ECG morphology as exhibited during hypoglycaemia

机译：低血糖期间显示的TU融合ECG形态的QT测量

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During hypoglycaemia, there is typically a change in the ECG characterised by a flattened and prolonged T wave, often accompanied by a fused U wave. In the presence of such U waves, there is no widely accepted method of measuring the QT interval. This study compares two possible methods: using the intersection of the isoelectric line and (1) the T wave, and (2) a tangent to the T wave. The methods were tested on 306 sets of high resolution ECG data recorded during hyperinsulinaemic hypoglycaemic clamp studies. A value of measurement subjectivity was also recorded for each measurement. Results show that the tangent method is more consistent and reproducible than the non-tangent method. Further, the non-tangent method was shown to be significantly more subjective than using a tangent. The tangent method is less reliant on observer experience, is more easily defined and should be considered when ECG data sets have a large number of U waves.
机译：在低血糖期间，ECG通常会发生变化，其特征是T波变平和延长，并经常伴有融合的U波。在存在这种U波的情况下，没有广泛接受的测量QT间隔的方法。本研究比较了两种可能的方法：使用等电线与（1）T波的交点，以及（2）与T波的切线的交点。在高胰岛素血症性降血糖钳​​夹研究期间记录的306组高分辨率ECG数据上测试了这些方法。每次测量也记录测量主观性的值。结果表明，切线方法比非切线方法更具一致性和可重复性。此外，非切线方法显示出比使用切线更主观的方法。切线方法较少依赖观察者的经验，更容易定义，当ECG数据集具有大量U波时，应考虑切线方法。

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