Value of annular plane systolic excursion difference in evaluation of heart systolic function of normal fetuses in ;the second and late trimester with echocardiography / 中华超声影像学杂志

ABSTRACT

Objective To obtain the annular plane systolic excursion difference (APSED)of fetuses in second and late trimester by free angle M-mode (FAM)and tissue motion of annular displacement (TMAD)in order to assess the fetal ventricular function.Methods The mitral annular plane systolic excursion(MAPSE)and tricuspid annular plane systolic excursion(TAPSE)of four hundred and fifty five normal fetuses from 20 to 41 weeks were measured by FAM echocardiography,and the difference between them were calculated.Early diastolic velocities (Em)of the mitral annular and early diastolic velocities (Em')of the tricuspid annular were estimated by pulsed-wave tissue Doppler imaging (TDI),meanwhile systolic velocities (Sm)of the mitral annular and systolic velocities (Sm')of the tricuspid annular were also estimated by TDI.Fifty normal fetuses in the second and late trimester were choosed randomly,two-dimension imaging was obtained at the apical four-chamber view,then mitral annular plane and tricuspid annular plane displacement curve were acquired at the same time by using off-line QLab 8.1 software,and the differences in the peak time between them were compared.The trace of annular displacement were recorded by color tissue tracking technology.Results There was a significant difference between FAM-TAPSE and FAM-MAPSE in different gestational weeks (P 0.05).Conclusions The APSED existed in the second and late trimester continually.It was considering associated with fetal ventricular torsion.As the growth of gestational weeks,the increase of APSED reflected the enhanced reserve capacity of the fetal ventricular torsion.APSED can reflect the longitudinal motion and torsion movement of fetal ventricle quantitatively,and can be used as a new index to assess the fetal cardiac function.