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目的探讨妊娠晚期(28~41周+6)正常胎儿左、右心室Tei指数的参考范围,为临床应用提供理论依据。方法应用多普勒超声心动图测量120例妊娠28~41周+6胎儿左、右心室的射血时间、等容收缩及舒张时间,计算左、右心室Tei指数,并分析与孕周的相关性。结果妊娠晚期正常胎儿左心室平均Tei指数为0.427±0.187,右心室平均Tei指数为0.416±0.161,两者比较,差异无统计学意义(P>0.05);不同孕周胎儿Tei指数比较,差异无统计学意义(P>0.05)。胎儿左、右心室Tei指数呈正相关(r=0.553,P<0.001)。结论 Tei指数不受孕龄的影响,可用于观察各种情况下的胎儿整体心功能变化。
Objective To explore the reference range of the Tei index of left and right ventricles in the third trimester of pregnancy (28 ~ 41 weeks +6), providing a theoretical basis for clinical application. Methods Doppler echocardiography was used to measure the ejection time, isovolumic contraction and diastolic time of 120 fetuses from 28 weeks to 41 weeks of gestation in +8 fetus. The left and right ventricular Tei index were calculated and the correlation with gestational age was analyzed Sex. Results The average Tei index of normal left ventricular in late pregnancy was 0.427 ± 0.187, and the average right ventricular Tei index was 0.416 ± 0.161. There was no significant difference between the two groups (P> 0.05). There was no significant difference in Tei index Statistical significance (P> 0.05). Fetal left and right ventricular Tei index was positively correlated (r = 0.553, P <0.001). Conclusion The Tei index is independent of gestational age and can be used to observe changes in fetal global cardiac function under various conditions.