Objective To explore the evaluation value of Tei index,left ventricular end diastolic volume(LVEDV),left ventric-ular end systolic volume(LVESV),stroke volume(SV)and myocardial performance index(MPI)measured by ultrasound on car-diac function change in full-term small-for-date infant.Methods From November 2020 to November 2022,a total of 100 full-term infants were enrolled as study group,which included 47 males and 53 females;gestational age was 37-41+6 weeks with mean gestational age of 39.62 weeks;body mass was 2.07-2.43 kg with mean body mass of 2.12 kg.According to gesta tional age,the infants were divided into early full-term small-for-date infant group(37-38+6 weeks)and late full-term small-for-date infant group(39-41+6 weeks),with 50 cases in each group.Fifty healthy full-term newborns from the same period were enrolled as control group,which included 25 males and 25 females;gestational aged 38-40+6 weeks with mean gesta-tional age of 39.33 weeks;body mass was 2.53-4.00 kg with mean body mass of 3.07 kg.Tei index,LVEDV,LVESV,SV,left ventricular ejection fraction(LVEF),cardiac output(CO),left and right cardiac vascular diameter,wall thickness,cardiac diameter index,mitral and tricuspid diastolic function index were measured by ultrasound,and cardiac function changes in full-term small-for-date infant were evaluated.Results The isovolumic contraction time(ICT)+isovolumic relaxation time(IRT)and ejection time(ET)of the left and right ventricles in control group,early full-term small-for-date infant group and late full-term small-for-date infant group were sequentially decreased,while Tei indexes of 3 groups sequentially increased,and the differences were statistically significant(P＜0.05).The control group,early full-term small-for-date infant group and late full-term small-for-date infant group were observed sequentially decreased in SV[(3.50±0.94)mL vs(2.96±0.63)mL vs(2.55±0.48)mL],LVEDV[(5.07±1.19)mLvs(4.71±1.05)mL vs(4.49±0.93)mL],LVEF[(71.53±4.52)％vs(66.19±3.21)％vs(63.44±2.98)％],CO index[(0.75±0.09)L/min vs(0.51±0.13)Umin vs(0.44±0.17)Umin],and sequentially increased in LVESV index[(1.46±0.37)mLvs(1.59±0.41)mL vs(1.66±0.43)mL],and the differences were statistically significant(P＜0.05).The control group,early full-term small-for-date infant group and late full-term small-for-date infant group were observed sequentially decreased in aortic root diameter(AOD)[(6.9±1.0)mm vs(6.0±0.8)mm vs(5.5±0.5)mm],left ventricular posterior wall end-diastolic thickness(LVPWD),left atrial end-systolic diameter(LAD),left ventricular end-systolic diameter(LVDS)and left ventricular end-diastolic diameter(LVDD),and the differences were statistically significant(F=39.947,37.000,27.820,34.742,27.990,P＜0.05).There were significant differences on thickness of interventricular septal end-diastolic(IVSD),mean arterial pressure(MAP),thickness of right ventricular anterior wall(RVAW)and right ventricular end-diastolic diameter(RVDD)in control group,early full-term small-for-date infant group and late full-term small-for-date infant group(F=16.107,11.868,39.000,9.511.P＜0.05).The A and E/A value of control group,early full-term small-for-date infant group and late full-term small-for-date infant group were sequentially increased,and the differences in groups were statistically significant(F=7.401,35.399,P＜0.05).Conclusion It is demonstrated that Tei index,LVEDV,LVESV,SV,CO measured by ultrasound in full-term small-for-date infant are significantly different from those of healthy full-term newborns,which is of great significance in evaluat-ing cardiac function changes.
ultrasoundTei indexleft ventricular end diastolic volume(LVEDV)left ventricular end systolic volume(LVESV)stroke volume(SV)full-term sample
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