Strategies for Diagnosis of Fetal right atrium dilation: Based on fetal cardiac anatomy and hemodynamics

• DOI: 10.21203/rs.2.24478/v1
• Publication Date: 2020-02-25T22:16:35Z
• Authors: Leisheng Zhao; Yu Wang; Ying Zhang
• Keywords: Ductus arteriosus; Volume overload

Abstract Background Fetal right atrium (RA) dilation is frequently detected in routine screenings while it remains a challenge to clarify the reasons. This study aimed analyze cardiac anatomy and hemodynamics of fetal RA changes hemodynamic indexes. Methods 420 fetuses with were included, which classified into 4 types: volume overload (Group A, n=117), pressure B, n=85), Ebstein’s anomaly C, n=16), physiological enlargement D, n=202). All types was divided two control groups according different gestational weeks (19-31 32-36 weeks). The ratio left (RA/LA) measured at Four-chamber view (4CV) . Peak velocity tricuspid regurgitation (V TR ) recorded each diseases. Results RA/LA 19-31GW were: A: 1.45±0.24, B: 1.28±0.15, C: 1.22±0.10, D: 1.28±0.18. 32-36GW 1.68±0.25, 1.46±0.23, 1.64±0.19, 1.45±0.27. V Group B (3.29±0.58 m/s) higher than that A (1.85±0.49 m/s), C (1.86±0.22 D (0.88±0.45 respectively. As for TR, there statistical significance among ductus arteriosus anomalies (3.98±0.41 pulmonary artery (3.03±0.38 restrictive FO (2.23±0.30 (all P<0.05). Conclusions We proposed protocol by used reasons dilation. compared degree atrial also provided reference value type