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Beat-to-beat QT interval variability in the 12 lead ECG

机译:12导联心电图的逐搏QT间隔变异性

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Beat-to-beat QT interval variability (QTV) is a marker of ventricular repolarization lability. Increased QTV has been associated ith cardiac mortality. The aim of this paper was to investigate QTV in the 12-lead ECG and the potential effect of age. Short-term ECGs (2 mins) of 48 healthy males ere studied. Beat-to-beat QTV as measured in each lead by using Berger''s template-stretching algorithm. We observed significant differences in QTV of different leads (ANOVA test: p < 0.0001). In addition, e investigated the effect of age by dichotomizing the data set based on the median age. Two-ay ANOVA showed no significant differences in QTV of older males compared to younger males. In conclusion, the magnitude of QTV depends on the lead selected for measurement.
机译:逐搏QT间期变异性(QTV)是心室复极化不稳定的标志。 QTV增加与心脏死亡率有关。本文的目的是研究12导联心电图中的QTV及其年龄的潜在影响。研究了48位健康男性的短期ECG(2分钟)。使用Berger的模板拉伸算法在每条导线中测量的逐次QTV。我们观察到不同导线的QTV有显着差异(ANOVA测试:p <0.0001)。此外,e通过根据年龄中位数将数据集二等分,研究了年龄的影响。两天ANOVA分析显示,与较年轻的男性相比,老年男性的QTV没有显着差异。总之,QTV的大小取决于选择用于测量的导线。

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