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Table 2 The detection rate of ventriculoarterial connections by different methods

From: Prenatal screening of fetal ventriculoarterial connections: benefits of 4D technique in fetal heart imaging

CHD (n) 2D (n) 4D-1 (n) 4D-2 (n) Combined (n)
18–28 GW     
 TGA (20) 70% (14) 50% (10) 100%# (20) 100%# (20)
 DORV (15) 80% (12) 53.3% (8) 80% (12) 80% (12)
 TOF (26) 76.9% (20) 57.7% (15) 80.8% (21) 96.2%* (25)
 TCA (10) 60% (6) 30% (3) 80% (8) 100%* (10)
29–36 GW     
 TGA (9) 66.7% (6) 22.2% (2) 55.6% (5) 66.7% (6)
 DORV (7) 85.7% (6) 28.6% (2) 42.9% (3) 85.7% (6)
 TOF (10) 80% (8) 20% (2) 50% (5) 80% (8)
 TCA (4) 75% (3) 0 25% (1) 75% (3)
  1. CHD, congenital heart disease; Combined, sonographers made the diagnosis using both the 2D and 4D-2 data; DORV, double-outlet right ventricle; GW, gestational weeks; TCA, truncus arteriosus; TGA, transposition of the great arteries; TOF, tetralogy of Fallot; Compared with 2D method
  2. * P < 0.05; # P < 0.01