Fig. 6From: Identification of fetal cardiac anatomy and hemodynamics: a novel enhanced screening protocolSonographic images of a 24-gestational-week fetus diagnosed with pulmonary valve atresia. Thickened pulmonary valves (indicated by arrows) were visualized in the right outflow tract view (a) via 2D. However, this anomaly was neglected by the sonographers under Protocol A because the valvular movement was difficult to visualize at times. However, color Doppler resolved this problem by visualizing the retrograde flow in the MPA (b), indicating pulmonary valve atresia. At the same time, no blood flow was detected entering the MPA across the thickened PV. AAO, ascending aorta; MPA, main pulmonary artery; PV, pulmonary valve; RV, right ventricle; S, spineBack to article page