Tei指数评价高原健康藏汉族儿童右室功能的差异性  

Tei Index for Assessing Right Ventricular Function in Healthy Children Living at Altitude

作　　者：徐书真 刘杰[2] 任丽华[3] 张耀仓 李素芝[3] 杨珍[3] 曹铁生[2] 

机构地区：[1]武警西藏总队医院特检科,拉萨市850003 [2]西安市第四军医大学唐都医院超声诊断科 [3]西藏军区总医院特诊科

出　　处：《中国超声医学杂志》2011年第9期799-802,共4页Chinese Journal of Ultrasound in Medicine

基　　金：西藏自治区自然科学基金项目(No.CHX2011059)

摘　　要：目的应用Tei指数评价高原健康儿童右室功能的种族差异性。方法随机选取拉萨世居藏族与移居汉族健康儿童各50例,测量其右心系统尺寸及双心室Tei指数,同时记录心率、血压及血氧饱和度(SaO_2)。结果两组儿童在性别、年龄范围、身高、体质量指数、心率、血压及SaO_2上是匹配的。除了汉族组的收缩压高于藏族组(P<0.05)。汉族组肺动脉内径、右房室腔径、右室游离壁厚度及右室Tei指数(RV Tei)均明显高于藏族组(P<0.05),而右室流出道内径及左室Tei指数在两组之间没有显著差异性;RV-Tei分别与肺动脉内径和有室游离壁厚度有着较强的正相关性(r>0.5,P<0.001)。结论 RV-Tei可敏感地反映高原健康儿童右室整体功能的种族差异性。藏族儿童较汉族儿童更适应于高原环境。Objective To study the ethnic differences in right ventricular（RV）function of healthy children living at high altitude by Tei index. Methods One hundred healthy children living at Lhasa were randomly selected and equally divided into two groups., native Tibetans at high-altitude（NTH）and Han migrants from sea level to high-altitude（HMSH）. Their right cardiac dimensions and biventricular Tel indexs were measured by Doppler echocardio- graphy. The heart rate（HR）, blood pressure（BP）, and arterial oxygen saturation（SaO2 ）were also recorded simultaneously. Results Both groups were comparable for gender, age, height, body mass index, HR, BP, and SaO2, except the systolic BP was slightly higher in HMSH than in NTH（P〈0.05）. The dimensions of pulmonary artery（PA）, right ventricle,and right atrium（RA）, and the RV free wall thickness, as well as the RVTei index were markedly higher in HMSH than those in NTH（P〈0.05） ; while the diameter of right ventricular outflow tract and left ventricular Tei index showed no significant differences between two groups. The RV-Tei index showed a strong positive correlation with PA diameter and RV free wall thickness, respectively（r〉0.5,P〈0. 001）. Conclusions The RV-Tei index can sensitively detect the ethnic differences in global RV function of healthy children living at high altitude. The Tibetan children are more adaptive to living at high altitude than Han children.

关 键 词：低氧 肺动脉高压 心功能 多普勒 心肌工作指数 

分 类 号：R445.1[医药卫生—影像医学与核医学] R725.4[医药卫生—诊断学]