Özet:

Purpose: The association between fetal aberrant right subclavian artery (ARSA) and Down syndrome has been known for a long time. The aim of our study was to determine the incidence of ARSA in our population and its association with Down syndrome and congenital heart diseases (CHD). Materials and Methods: Between 2015-2018 years, fetal echocardiography was performed in 3150 pregnant population at a tertiary referral center for prenatal diagnosis. The presence of ARSA was verified by visualization of the transverse 3-vessel trachea view by color Doppler sonography during fetal echocardiography. The frequency of ARSA and its correlation with Down syndrome were investigated in our study. Results: Among the 3150 patients, an ARSA was detected in 42 fetuses (1.3%) and isolated ARSA was detected in 36 fetuses (1.14%). Of nine fetuses with Down syndrome, ARSA was positive in two (22.2%). ARSA was positive in only one of the fetuses with CHD (4.1%). The positive likelihood ratios of isolated ARSA for Down syndrome and CHD were 0.73 and 3.81, respectively. Conclusion: In our case series, prenatal detection of ARSA does not appear to be a strong marker alone of Down syndrome and the isolated ARSA shows a weak association with CHD.

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