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本文报告曾长期移居高原(4000m)重返低地后(2260m)8年心血管x线形态学变化。61名体力劳动者,按重返低地居住年限停留梯度,分析心血管四项指标改变,以探讨慢性缺氧所致肺动脉高压改变在重返低地后再适应过程中的可复性变化及其意义。结果表明:久居高原群体肺动脉段突度、右肺下动脉横径、降支与气管横径比值等三项指标参数重返低地后2年即已呈减小趋势,差异显著(P<0.01)。单纯肺动脉高压下山后恢复快、幅度大、时间短,高原性心脏病者恢复相对缓慢,但随重返低地后居住年限延长,可自行恢复,而高原性心脏病并发肺心病者则不然。
This article reports on the cardiovascular and x-ray morphological changes after a long-term migration to the lowland (4000m) for 8 years (2260m). 61 physical laborers, according to the return gradient to stay in residential life gradient, analysis of cardiovascular changes in four indicators to explore chronic hypoxia-induced changes in pulmonary hypertension in re-adapt to the process of re-adaptation and its significance . The results showed that the indexes of pulmonary artery segment, the diameter of the right inferior pulmonary artery, the ratio of descending branch and tracheal diameter of the long-standing plateau population showed a decreasing trend two years after they returned to the lowland, with a significant difference (P <0.01) . Simple pulmonary hypertension recovered quickly after the mountain, the magnitude of a short time, the recovery of patients with heart disease is relatively slow, but with the extension of life after returning to the low, can be self-recovery, and pulmonary heart disease complicated by heart disease were not.