2 | CASE REPORT
Case 1: A 32-year-old pregnant woman, gravida 2, para 1, was diagnosed
by prenatal fetal echocardiography at 25+1 weeks of
gestation. An “U”-shaped VR can be seen with RAA, aberrant left
subclavian artery (LSA) and left-sided ductus arteriosus (DA) in
three-vessel trachea view (Fig 1A). Color blood flow can show the
“U”-shaped VR and aberrant left subclavian artery(ALSA) (Fig 1B).
Four-dimensional(4D) color Doppler ultrasound ,HD-flow render mode and
STIC were used to show VR and ALSA(Fig 1C) . Two-dimensional(2D
)ultrasound could demonstrat the ALSA in descending aorta long axis view
(Fig 1D). Color blood flow demonstrating the ALSA (Fig 1E). The imaging
of RAA and ALSA were shown with HD-flow render mode and STIC(Fig 1F).
Amniocenntesis showed no chromosomal abnormality. A male infant was
delivered by vaginal delivery with a birth weight of 3610 kg at
39+5 weeks of gestation and he has no signs of
tracheal and esophageal compression.
Case 2:A 21-year-old pregnant woman,gravida 1, para 0, underwent fetal
echocardiography examination at 23+5 weeks’ gestation
due to DAA diagnosed at other hospital by system ultrasound. 2D
ultrasound showed an “U”-shaped VR with RAA and left-sided DA by
three-vessel trachea(3VT) view (Fig. 2A). Color blood flow could show
the “U”-shaped VR and left innocent artery(LINA) (Fig 2B). 4D color
Doppler ultrasound ,HD-flow render mode and STIC were used to show VR
and LINA (Fig 1C). A female infant was delivered by cesarean section
with a birth weight of 3920 kg at 40+2 weeks of
gestation. The newborn did not show signs of tracheal and esophageal
compression also.
Case 3: A 36-year-old maternity, gravida 2, para 1,was performed fetal
echocardiography examination at 28 weeks’ gestation due to senior
pregnant women. RAA with mirror branch was diagnosed. A review of the
fetal echocardiogram revealed that the vascular ring was a DAA two weeks
later(Figure 3A,3B,3C). A cesarean section was performed at
39+1 weeks with the request of the maternity. A male
infant weighing 3250g was delivered. The infant present ed of airway
obstruction in the first year of birth and computed tomography
angiography was performed postpartum, the DAA could be seen (Figure 3D).
The child underwent cardiac surgery at the age of one.The left aortic
arch was blocked because of the advantage of the right arch and the
prognosis was good.