Prenatal Diagnosis of Abdominal Aorta–Hepatic Artery–Umbilical Vein Fistula Using High‐Definition Flow Render Mode and Spatiotemporal Image Correlation

Fetal abdominal aorta–hepatic artery–umbilical vein fistulas are rare congenital vascular‐related malformations. This study aimed to assess the diagnostic efficacy of ultrasound in detecting fetal aorta–hepatic artery–umbilical vein fistulas using high‐definition flow (HD‐flow) render mode and spatiotemporal image correlation (STIC) technology. The study emphasizes six case analyses of abdominal aorta–hepatic artery–umbilical vein fistula using HD‐flow render mode and STIC. Postnatal outcome evaluations were performed at our medical facility. The fistulas formed a connection between the abdominal aorta and the umbilical vein. HD‐flow render mode and STIC were acquired in all six cases. In three cases, fistulas with a diameter >3 mm were associated with extracardiac structural abnormalities and congenital heart defects. The incidence of heart failure was higher when the ratio of the fistula diameter to the umbilical vein diameter was >0.65 and to the abdominal aorta diameter was >0.9. Three fetuses were viable to survive, while three did not, including one that died in utero. HD‐flow render mode and STIC facilitate a more accurate and comprehensive observation of the hemodynamics of the fetal abdominal aorta–hepatic artery–umbilical vein fistula, enabling the early diagnosis of related complications and determination of prognosis.