中国人不同年龄和性别正常人心电图QRS波

目的：建立中国人不同年龄和性别正常心电图ＱＲＳ波标准。方法：４３２２例自出生至８５岁不同年龄和性别健康人１４导联心电图ＱＲＳ波，分１１个年龄组进行分析统计。结果：ＱＲＳ波振幅及心电轴均有明显的年龄和性别差异。ＱＲＳ波振幅随年龄的增减女性出现早于男性。新生儿阶段，ＱＲＳ波振幅女婴〉男婴，青春期及中年人男性〉女性，婴幼儿及老年人笥别差异相对不明显。

Electrocardiographic QRS waves of healthy Chinese population with different ages and sexes]

OBJECTIVE: To develop a normal electrocardiographic QRS wave standard in Chinese population with different ages and sexes. METHODS: Fourteen leads electrocardiographic QRS waves of 4,322 Chinese healthy subjects aged from birth to 85 years old divided into 11 age-groups were analysed and studied. RESULTS: There were highly significant differences in QRS amplitudes and cardiac electric axes of different ages and sexes. The changes of QRS amplitudes which increased and decreased with advancing age were usually earlier in female than in male. Comparing with QRS waves there were higher QRS amplitudes in girls than in boys in the newborn period; however, it is higher in male than in female in puberty and middle-aged persons. The sex difference was not obvious relatively in small children and the aged. There was significant difference in QRS amplitudes when electrocardiograms of Chinese people compared with those of Westerners. CONCLUSION: A Chinese normal electrocardiographic QRS standard established according to different ages and sexes may be applied clinically.