Hamela-Olkowska Anita, Szymkiewicz-Dangel Joanna
Poradnia Perinatologii i Kardiologii Perinatalnej, II Katedra i Klinika Poloinictwa i Ginekologii Warszawski Uniwersytet Medyczny, Warszawa, Polska.
Ginekol Pol. 2011 Feb;82(2):108-13.
To establish the values of the pulsed Doppler myocardial performance index (MPI, Tei index) for the left and the right ventricle in normal fetuses at 18 to 40 weeks gestation.
Echocardiography exams were performed in 140 normal fetuses at 18 to 40 weeks gestation at the tertiary centre for fetal cardiology MPI was calculated in pulsed Doppler using formula: (a-b)/b. The time a was measured from a closure click to the subsequent opening click of the mitral/tricuspid valve and time b from opening to the closure clicks of the aortic/pulmonary valve.
The mean MPI for the LV was 0.47 +/- 0.07 and for RV 0.48 +/- 0.1. There was no difference between the Tei index LV and the Tei index RV (p = 0.41). We observed a linear correlation between the Tei index LV and the Tei index RV (p = 0.008; r = 0.22). Fetal heart rate and gestational age had no effect on the MPI for both ventricles.
The assessed normal values of Tei index for the left and the right ventricles in fetuses may be used in comparison of myocardial performance in various clinical settings.
建立孕18至40周正常胎儿左、右心室的脉冲多普勒心肌性能指数（MPI，Tei指数）值。
在胎儿心脏病三级中心，对140例孕18至40周的正常胎儿进行超声心动图检查。使用公式(a-b)/b通过脉冲多普勒计算MPI。时间a从二尖瓣/三尖瓣的关闭喀喇音测量至随后的开放喀喇音，时间b从主动脉瓣/肺动脉瓣的开放至关闭喀喇音测量。
左心室的平均MPI为0.47±0.07，右心室为0.48±0.1。左心室Tei指数与右心室Tei指数之间无差异（p = 0.41）。我们观察到左心室Tei指数与右心室Tei指数之间存在线性相关性（p = 0.008；r = 0.22）。胎儿心率和孕周对两个心室的MPI均无影响。
所评估的胎儿左、右心室Tei指数正常数值可用于各种临床情况下心肌性能的比较。
