Imawari Y, Saitoh M, Kajino Y, Haneda N, Nishio T, Mori C, Kijima Y
Jpn Circ J. 1984 Dec;48(12):1406-10. doi: 10.1253/jcj.48.1406.
Frank vectorcardiograms recorded on magnetic tape were analyzed by a computer. The study population was 835 normal children aged from 6 to 16. Magnitudes, angles (azimuth, elevation) of the maximal spatial QRS vector and QRS duration were calculated. The magnitude of maximal spatial QRS vector increased significantly in males compared to those in females at ages 9-10, 11-12 (p less than 0.01) and 15-16 (p less than 0.001). Though there was no significant difference of elevation in either sex, azimuth tended to move more anteriorly in females than in males. QRS duration in males became longer with increasing age, while in females at age 15-16, it decreased (p less than 0.001).
计算机分析了记录在磁带上的Frank向量心电图。研究对象为835名6至16岁的正常儿童。计算了最大空间QRS向量的大小、角度（方位角、仰角）以及QRS时限。在9 - 10岁、11 - 12岁（p < 0.01）和15 - 16岁（p < 0.001）时，男性最大空间QRS向量的大小相比女性显著增加。虽然两性的仰角没有显著差异，但女性方位角比男性更倾向于向前移动。男性的QRS时限随年龄增长而变长，而女性在15 - 16岁时QRS时限缩短（p < 0.001）。
