OP18.08: The new maker, triangle sign for fetal screening of isolate infracardiac total anomalous pulmonary venous return (TAPVD)

Abstract

Isolate TAPVD is one of common congenital heart defects which needs the emergent cardiac surgery soon after birth. Infracardiac(type 3) is the commonest type of isolate TAPVD and always complicated with severe pulmonary stenosis. However its detection rate is still low. The aim of this retrospective study is to establish a new and effective marker for fetal screening. Seven cases of isolate type 3 TAPVD, six cases of isolate other type TAPVD, fifty normal heart are enrolled in this study. The gestational age were 18 to 38 weeks. We evaluated the position and the size of vertical vein (VV) in the upper abdominal plane just under four chamber view. We measured the surface area of Inferior vena cava (IVC), descending aorta (DAO) and VV. The surface ratio of VV/IVC, VVV/DAO were calculated. We recognised VV in all cases of type 3 TAPVD. We also recognised echo free space in a few cases of other type TAPVD or normal cases. But we considered it esophagus because it disappeared or no colour flow mapping. The position of VV was between DAO and IVC. Three vessels made a triangle. The biggest l was IVC and smallest was VV. The surface area ratio of VV/DAO and VV/IVC were 0.88 (0.5–1.12) and 0.46 (0.12–0.67). The triangle were recognised easily in all type 3 TAPVD and not in any other type TAPVD nor normal heart. So this triangle sign seems to become a new marker for fetal screening of isolate type 3 TAPVD. Supporting information can be found in the online version of this abstract Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.