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在海拔80米、2800米、4500～4600米检测了289名从事不同劳动强度的男性健康青年的肺血流图。在海拔2800米肺血流图无明显变化,4500～4600米的肺血流图图形和各参数值均有显著改变。这说明在高海拔地区肺血管阻力增大,肺动脉压增加,每搏心输出量减少。重体力劳动者比轻体力劳动者变化明显。 海拔2800米心电向量图和心电图诊断为右心室肥厚者,肺循环未引起明显改变,其发生肥厚原因似以心外因素为主。在高海拔地区肺血流图对高原缺氧反应比心电向量图和心电图敏感。 目前心导管技术在高原条件下较难广泛使用。肺血流图方法敏感、简便、安全能重复检查,可协助临床医生判断在高原缺氧条件下肺循环机能状态和肺动脉压的变化。
In the 80 meters above sea level, 2800 meters, 4500 ~ 4600 meters detected in 289 different types of male labor force of young healthy pulmonary blood flow diagram. Pulmonary blood flow at 2800 m above sea level showed no significant change, pulmonary blood flow graph of 4500 ~ 4600 meters and the values of the parameters were significantly changed. This shows that in the high altitude pulmonary vascular resistance increased pulmonary arterial pressure increased cardiac output reduced stroke. Heavy manual workers than light manual workers change significantly. 2800 meters above sea level ECG vector diagram and ECG diagnosis of right ventricular hypertrophy who did not cause significant changes in pulmonary circulation, its occurrence of hypertrophy is likely due to extracardiac factors. Pulmonary hemorrhage patterns at high altitudes are more sensitive to hypoxia than to electrocardiogram and electrocardiogram (ECG) maps. At present, cardiac catheterization is more difficult to use widely in plateau. Pulmonary blood flow diagram method is sensitive, simple, safe and repeatable examination, which can help clinicians to judge the changes of pulmonary circulatory function and pulmonary arterial pressure under hypoxia.