Objective:To investigate the values of detecting cardiac function in fetal distress by Tei index.Methods:Study consisted of 32 cases of fetal distress and 80 matched normal subjects.We recorded the Doppler sample volume at mitral valve in the cardiac four-chamber view of the heart.Respectively

population below and above the aortic valve.Mitral A peak measured E peak to the beginning of the end of time a

aortic ejection time b

measured for 2~3 cycles

then chosing the average.According to the formula ICT + IRT/ET = a-b/b

we caculated the Tei index.Results:It showed Tei index of cases the fetal distress significantly larger than normal fetuses(P<0.05).Conclusion:Tei index is simple and reproducible.It may be used as regular indicator evaluating of fetal overall cardiac function

which has clinical value for early observation of fetal distress and evaluation their therapeutic effects.