[Retracted] Diagnostic Value of Abdominal B-Ultrasound for Congenital Heart Disease Complicated with Extracardiac Malformation in the Second Trimester of Pregnancy

Table 4

Success rate of abdominal B-ultrasound in detecting various sections of heart at different gestational weeks (n, %).

Gestational week	Number of cases	Four-cavity tangential plane	Left ventricular outflow tract section	Right ventricular outflow tract section
10 weeks	50	72% (36/50)	16% (8/50)	14% (7/50)
12 weeks	50	78% (39/50)	20% (10/50)	14% (7/50)
14 weeks	50	92% (46/50)	80% (40/50)	76% (38/50)

13–27 weeks was the second trimester. Compared with the 14th week and the 10th week, the difference in the success rate of displaying four-cavity tangential plane was statistically significant (X² = 6.78; P = 0.009). Compared with the 14th week and 10th week, the difference in the success rate of left ventricular outflow tract section display was statistically significant (X² = 41.03; P = 0). Compared with the 14th week and 10th week, the difference of success rate in right ventricular outflow tract section is statistically significant (X² = 38.83; P = 0).