【摘要】 <正>高原地区正常儿童心电图的报道,在我国不多。为了探索高原地区正常学龄期儿童心电图的正常范围,以便对儿童心脏功能发育进行评价,我们于1978～1979年间,对海拔2,300米的青海西宁地区的500名正常学龄期儿童心电图进行了分析。更多还原

【Abstract】 Electrocardiographic observations were made in 500 normal school children living at 2300 meters above sea level in Zining area in 1978-1979. 500 subjects （male 248, female 252）were divided into 4 groups; 7-9 yrs. （215 cases）, 10-14 yrs. （285 cases）, some children were selected from 12-14 yrs, and subgrouped into two groups （male 73 and female 71 cases）.Every subject was confirmed as a healthy child by a complete history, physical examination and chest X-ray. The routine technique with ten leads （e. g. I , I , I , aVR. aVL, aVF, V₃R , V₁, V₃, V₆） recording were used. The data were collected by the same specially trained person. The results were statistically analysed and compared with those in the plain and Changsha area etc. The most common pattern of ECG in the children in the high altitudes are a little faster in heartrate, more rightward in the mean electrical axis, clockwise rotated, and prolonged in P-R intervals. Shortening of the P-wave and QRS-wave are also present. These findings imply that the potential is greater in the right heart. The voltage of the T-wave is also lower.These changes should not be regarded as pathological conditions, but may be considered as a normal basis for the evaluation of children of the same age and sex in Zining area.更多还原