Table 7 Prenatal ultrasound findings, genetic results and postnatal outcomes in fetal TOF with a normal cardiac angle group (TOF-CAn) and in fetal TOF with an abnormal cardiac angle group (TOF-CAab)

Maternal age, years

30 (20~42)

30 (19~38)

Gestational age at diagnosis, weeks

23^+ 3 (16^+ 2~30^+ 3)

22^+ 6 (18^+ 5~31^+ 4)

 TOF-pulmonary valve atresia (%)

13.0 (11/73)

14.3 (3/23)

 TOF-pulmonary valve stenosis (%)

82.2 (60/73)

87.0 (20/23)

 TOF-an absent pulmonary valve syndrome (%)

2.7 (2/73)

0 (0/23)

Intracardiac anomalies (%)

43.8 (32/73)

39.1 (9/23)

Extracardiac defects (%)

50.7 (37/73)

52.2 (12/23)

Genetic anomalies (%)

6.8 (5/73)

39.1 (9/23)

VOUS (%)

1.4 (1/73)

8.7 (2/23)

Survival rate (%)

85.7 (18/19)^a

88.9 (17/19)^a