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EP10.23: Fetal echocardiography: normal reference ranges for the three‐vessel view for the Japanese population

1. Saiseikai Suita Hospital, Suita, Osaka, Japan. 2. Osaka Medical College Hospital, Osaka, Osaka, Japan. Objectives Many paper illustrates the importance of the three-vessel view(3VV) in fetal heart screening. However, the reference range for the 3VV has not been fully investigated. And the racial variability in fetal size and development can lead to variability in the size of fetal cardiac structures. The purpose of this study was to establish the gestational age (GA) specific reference range of the size of the 3VV in the Japanese population and to examine the result. Conclusions Our study have provided the reference values of fetal heart threevessel diameters during gestation for Japanese population. We showed that each vessel size was strongly correlated with gestational age and the ratio of PA/ AO takes a fixed value. Therefore, when the threevessel view is scanned as a part of standard evaluation during prenatal screening, the interpretation of vessel size needs to be adjusted according to gestational age. Results Strong correlations were found between the size of the 3VV and GA (p<0.001). The mean ratio of PA/ AO was 1.23±0.009, (95%CI 1.21-1.25) and that was not associated with GA (p=0.25).