Myocardial performance is diminished in persistent SVT and will lead to hydrops fetalis (HDF). This study sought to determine which methods of fetal echocardiography are best for evaluating treatment and outcome in these fetuses. Methods: Ten infants with HDF due to SVT were included in this study. No fetus has structural heart disease. Serial cardiovascular function was estimated from CC/TC ratio, left ventricular shortening fraction, tricuspid E and A velocities and E/A ratio, mitral E, A velocities and E/A ratio and Doppler flow patterns in the free loop of the umbilical cord, MCA, ductus arteriosus and ductus venosus (DV) as well as maximal velocities and time velocity integrals into the ascending aorta and main pulmonary artery. The Tei index was calculated as the sum of the isovolumetric contraction time (ICT) and the isovolumetric relaxation time (IRT) divided by the ejection time using the ''clicks'' method. These parameters were compared to age matched normal fetuses from our data base. Changes in the gross measurements of third space effusions were considered demonstrable of improvement of fetal cardiovascular status.
Results:The most sensitive indicator of change in fetal function was the Tei index followed by CC/TC ratio. Tei index is the first cardiovascular parameter which gets normalised in these fetuses responding to the treatment. There was no significant change over time with E/A ratios, LV shortening fraction or peripheral arterial Doppler values. DV A wave reversal normalized with cessation of SVT with normal PI values. DV size went from greater than the 95% to normal with cessation of SVT.
Conclusions:The Tei index easily performed from 14 weeks through term. It is a useful and likely the most sensitive method of evaluating global myocardial performance in followup of fetuses with HDF especially due to SVT.
Cardiovascular parameters Intial Values Mean 4-7 Days Mean 7-27 Days MeanCC/TC 0.65 ± 0.31 0.60 ± 0.21 0.50 ± 0.24 DV size 2.1 ± 0.1 1 .78 ± 0.12 1.6 ± 0.12 LV SF 36 ± 1.5 4 1 ± 1.6 4 5 ± 2. Objectives: To observe the hemodynamic status of heart in normal fetuses between 11 + 0 to 14 + 6 weeks gestation by Doppler ultrasound for obtaining the normative data of cardiac arteries hemodynamic.Methods: There were 230 pregnant women had a general examination by transabdominal ultrasound examination between 11 + 0 to 14 + 6 gestational weeks. We observed the fetal heart position and size, the form of aorta (AO), pulmonary artery (PA), ductus arteriosus (DA) and ductus venous (DV), to measure the blood stream from AO, PA, DA and DV for obtaining the large vessels hemodynamic parameter. The images could be saved in hard, and can observe and measure later. All fetuses had the general and echocardiography examination during the second trimester to exclusion the CHD or another malformations.
Results:The visualized rate of fetal heart were differ in different planes. The four-chamber view has the highest rate of visualization, the DA has a poor. The PA inner diameter larger than AO, and there are sign...
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