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目的测量正常中孕胎儿左、右心室Tei指数的范围,测量正常中孕胎儿左、右心室射血分数(EF)值及E/A的范围,并探讨他们之间的相关性。方法筛选出48例正常中孕胎儿,测量其左、右心室射血分数(EF);测量二、三尖瓣口舒张早期血流峰值E峰与舒张晚期血流峰值A峰,并测量其比值(E/A);Tei指数的计算:=(ICT+IRT)/ET=(a-b)/b。结果 22～28周胎儿左、右心室Tei指数的范围:左心室Tei指数:0.38±0.09,右心室Tei指数:0.33±0.08。左心室EF:61%±20%,右心室EF:66%±19%。二、三尖瓣口舒张早期与舒张晚期血流峰值比(E/A):二尖瓣E/A:0.59±0.09,三尖瓣E/A:0.64±0.11:右右室Tei指数分别与左右室EF及E/A呈轻度负相关;左右室Tei指数呈正相关。结论 Tei指数与左、右心室射血分数及E/A有相关性,Tei指数能综合评价胎儿心室的收缩和舒张功能。
Objective To measure the range of Tei index of left and right ventricles of normal pregnant women and measure the range of left and right ventricular ejection fraction (EF) and E / A of normal pregnant women and to explore the correlation between them. Methods Forty-eight normal pregnant women were screened and their left and right ventricular ejection fraction (EF) were measured. Peak E and peak A of peak diastolic blood flow were measured at early and late diastole in both tricuspid valve and mitral valve, (E / A); Calculation of Tei index: = (ICT + IRT) / ET = (ab) / b. Results The ranges of Tei index of left and right ventricles of fetus from 22 to 28 weeks were: left ventricular Tei index: 0.38 ± 0.09, right ventricular Tei index: 0.33 ± 0.08. Left ventricular EF: 61% ± 20%, right ventricular EF: 66% ± 19%. E / A: E / A of mitral E / A: 0.59 ± 0.09, E / A of tricuspid valve: 0.64 ± 0.11: The Tei index of right and left ventricle were Left and right ventricular EF and E / A showed a slight negative correlation; left and right ventricular Tei index was positively correlated. Conclusion The Tei index has correlation with left and right ventricular ejection fraction and E / A, Tei index can comprehensively evaluate the fetal ventricular systolic and diastolic function.