Fig. 4
From: Identification of fetal cardiac anatomy and hemodynamics: a novel enhanced screening protocol
Sonographic images of a 22-gestational-week fetus diagnosed with TGA. The 4CV (a) shows four symmetric chambers with no obvious anomalies present. In the left (b) and right (c) outflow tract views, the connections of LV with MPA and RV with AAO are detected, respectively. Correct identification of the AAO and MPA was critical in making the diagnosis, which was accomplished by sonographers under Protocol B but failed under Protocol A. 4CV, four-chamber view; AAO, ascending aorta; DAO, descending aorta; LA, left atrium; LV, left ventricle; MPA, main pulmonary artery; RA, right atrium; RV, right ventricle; S, spine; TGA, transposition of the great arteries. The arrow indicates the bifurcation of the MPA