CH in pregnancy was significantly associated with maternal age ≥30 years, nonwhite race, low level of schooling, parity ≥3 children, weight gain ≥16 kg, greater rates of cesarean section, Apgar score at the first and fifth minutes <7, umbilical artery pH ≤7.1, fetal weight ≤2500 g, need for neonatal intensive care, preterm labor during pregnancy, abruptio placentae, birth injury, small-for-gestational age babies and higher rates of preterm babies, fetal and neonatal mortality. It should be emphasized that the variables mentioned are representative or poor birth conditions in the group of chronic hypertense pregnant women.
Objective To evaluate the accuracy of the diagnosis of fetal heart diseases obtained through ultrasound examinations performed during the prenatal period compared with the postnatal evaluation. Methods A retrospective cohort study with 96 pregnant women who were attended at the Echocardiography Service and whose deliveries occurred at the Complexo Hospitalar Santa Casa de Porto Alegre, in the state of Rio Grande do Sul, Brazil. Risk factor assessment plus sensitivity and specificity analysis were used, comparing the accuracy of the screening for congenital heart disease by means of obstetrical ultrasound and morphological evaluation and fetal echocardiography, considering p < 0.05 as significant. The present study was approved by the Research Ethics Committee of the Institution. Results The analysis of risk factors shows that 31.3% of the fetuses with congenital heart disease could be identified by anamnesis. The antepartum echocardiography demonstrated a sensitivity of 97.7%, a specificity of 88.9%, and accuracy of 93% in the diagnosis of congenital heart disease. A sensitivity of 29.3% was found for the obstetric ultrasound, of 54.3% for the morphological ultrasound, and of 97.7% for the fetal echocardiography. The fetal echocardiography detected fetal heart disease in 67.7% of the cases, the morphological ultrasound in 16.7%, and the obstetric ultrasound in 11.5% of the cases. Conclusion There is a high proportion of congenital heart disease in pregnancies with no risk factors for this outcome. Faced with the disappointing results of obstetric ultrasound for the detection of congenital heart diseases and the current unfeasibility of universal screening of congenital heart diseases through fetal echocardiography, the importance of the fetal morphological ultrasound and its performance by qualified professionals is reinforced for a more appropriate management of these pregnancies.
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