Araoye M A
Afr J Med Med Sci. 1984 Mar-Jun;13(1-2):85-91.
The twelve-lead electrocardiogram (ECG) was analysed to describe the frontal plane P wave, T wave and QRS axes in 1220 healthy adult Nigerians. Axis determination was based on the principle of resolution of forces along the three Einthoven and three Goldberger leads referred to as the 'hexaxial reference system'. The P-wave axis ranged from 37.8 to 72.6 degrees without sex variation but with slight rightward shift with age. The T-wave axis ranged from 24.1 to 68.5 degrees without exhibiting age or sex variation. The proposed ranges of QRS axis deviation in the Nigerian were 0 to +90 degrees for normal, 0 to -90 degrees for LAD, and +90 to +/- 180 degrees for RAD. There was no sex variation in QRS axis until after the sixth decade of life. The axis in Nigerians was more leftward than that of Caucasians of the same age; but in both races the QRS axis exhibited a leftward shift with age.
对1220名健康成年尼日利亚人的十二导联心电图（ECG）进行分析，以描述额面P波、T波和QRS轴。轴的确定基于沿三个Einthoven导联和三个Goldberger导联（即“六轴参考系统”）的力的分解原理。P波轴范围为37.8至72.6度，无性别差异，但随年龄略有右移。T波轴范围为24.1至68.5度，无年龄或性别差异。尼日利亚人QRS轴偏差的建议范围为：正常为0至+90度，左前分支阻滞（LAD）为0至-90度，右束支传导阻滞（RAD）为+90至+/-180度。直到生命的第六个十年后，QRS轴才出现性别差异。尼日利亚人的轴比同年龄的白种人更偏左；但在两个种族中，QRS轴均随年龄出现左移。
