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海拔２２６０ｍ老年１３例（Ａ组），海拔３５００～４２００ｍ老年１２例（Ｂ组），年龄６０～７４岁。ＥＣＧ、ＵＣＧ、心三位片和肺功能无右室肥大和器质性心脏病及慢阻肺。脉冲多普勤测定三尖瓣口Ｅ＿ｖ、Ａ＿ｖ、Ｅ＿Ｉ、Ａ＿Ｉ、Ａ＿ｖ／Ｅ＿Ｉ、ＥＤＴ、ＡＴ。结果发现Ｂ组的Ａ＿ｖ／Ｅ＿ｖ增大（Ｐ＜０．００１）；ＥＤＴ及ＡＴ缩短（分别Ｐ＜０．００１）；ＡＴ与ＥＤＴ呈高度正相关（ｒ＝０．９３５、Ｐ＜０．０１）；ＡＴ与Ａ＿ｖ／Ｅ＿ｖ呈高度负相关（ｒ＝－０．９１６、Ｐ＜０．０１）；且ＥＤＴ与Ａ＿ｖ／Ｅ＿ｖ亦呈高度负相关（ｒ＝－０．９０７、Ｐ＜０．０１）；表明尚无高原心脏病的海拔３５００ｍ以上高原老年人，右室舒张功能减低，右室后负荷已有一定程度增加，两者间呈高度正相关关系。
Thirteen cases were aged 2260m (group A) and 12 cases (group B) aged 3500 ~ 4200m were aged 60-74 years old. ECG, UCG, heart three tablets and pulmonary function without right ventricular hypertrophy and organic heart disease and chronic obstructive pulmonary disease. Pulsed Doppund Qin measured tricuspid valve E_v, A_v, E_I, A_I, A_v / E_I, EDT, AT. The results showed that the A_v / E_v of group B increased (P <0.001), the level of EDT and AT decreased (P <0.001 respectively), and AT was positively correlated with that of EDT (r = 0.935, ); AT was negatively correlated with A_v / E_v (r = -0.916, P <0.01); and EDT was negatively correlated with A_v / E_v (r = -0.907, P <0.01 ), Indicating that there is no plateau heart disease altitude above 3500m altitude plateau, right ventricular diastolic function decreased right ventricular afterload has increased to a certain extent, the two showed a highly positive correlation.