Ventricular repolarisation abnormalities are important in arrhythmia provocation. The dispersion of repolarisation duration is not the only aspect of repolarisation heterogeneity. Spatial vectorcardiographic descriptors constitute a novel approach to quantify ventricular repolarisation. To test the ability of vectorcardiographic descriptors to discriminate between hypertensives with high or low blood pressure (BP), 110 treated hypertensives (mean age 63.6 +/- 12.1 years) were classified in the high (systolic BP > or = 160 mm Hg or diastolic BP > or = 95 mm Hg) (n = 67), or the low (systolic BP < 160 mm Hg and diastolic BP <95 mm Hg) (n = 43) BP group. The maximum QT, JT, and T peak-T end intervals and the QT, JT, and T peak--T end dispersion were calculated from a digitally recorded 12-lead electrocardiogram (ECG). X, Y, and Z leads were reconstructed from the 12-lead ECG. The amplitude of the maximum spatial T vector (spatial T amplitude), the angle between the maximum spatial QRS and T vectors (spatial QRS-T angle) and the frontal plane QRS-T angle were calculated. The spatial QRS-T angle was higher in patients with high compared to those with low BP (P = 0.025). All conventional ECG markers of the dispersion of ventricular repolarisation duration failed to demonstrate significant differences between hypertensives with high or low BP. In conclusion, the spatial QRS-T angle was significantly increased in those treated hypertensive patients who showed repeatedly high BP values. Hence, we may suggest that the angle between the directions of ventricular depolarisation and repolarisation is a sensitive marker of the repolarisation alterations in systemic hypertension. Journal of Human Hypertension (2001) 15, 63-70

中文翻译：

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空间QRS-T角是高血压患者心室复极的标志。

心律复律异常在心律不齐的激发中很重要。重新极化持续时间的分散不是重新极化异质性的唯一方面。空间矢量心电图描述符构成量化心室复极的新方法。为了测试矢量心电图描述符区分高血压或高血压（BP）的能力，将110例接受治疗的高血压（平均年龄63.6 +/- 12.1岁）分类为高血压（收缩压>> = 160 mm Hg或舒张压） BP>或= 95 mm Hg）（n = 67），或低血压（收缩压<160 mm Hg和舒张压BP <95 mm Hg）（n = 43）BP组。根据数字记录的12导联心电图（ECG）计算最大QT，JT和T峰值-T末端间隔以及QT，JT和T峰值-T末端弥散。X，Y，Z导联从12导联的ECG重建。计算最大空间T向量的振幅（空间T振幅），最大空间QRS和T向量之间的夹角（空间QRS-T角）和额平面QRS-T角。高血压患者的空间QRS-T角高于低血压患者（P = 0.025）。心室复极化持续时间分散的所有常规ECG标记均未显示具有高BP或低BP的高血压之间的显着差异。总之，在那些反复出现高BP值的高血压患者中，空间QRS-T角显着增加。因此，我们可能认为心室去极化和复极化方向之间的夹角是系统性高血压复极化改变的敏感标志。人类高血压杂志（2001）15，63-70