Table 1 Protocol used for standardized examination of the fetal heart

1

Position of the fetus to determine the situs

2

Cross-section of the fetal abdomen, then slide in the cephalic direction

S: Determine the position of the stomach, inferior vena cava and the aorta

A: Four-chamber view

B: Outflow-tract of aorta from left ventricle

C: Outflow tract of pulmonary artery

D: Three vessel view and arches

3

Repeat the slide with addition of color Doppler

A: Four-chamber view

B: Outflow-tract of aorta from left ventricle

C: Outflow tract of pulmonary artery

D: Three vessel view and arches