Truncus arteriosus case 2

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Clip showing a more or less normal 4 chamber view.
The cardiac axis is, however, abnormal.
The angle of almost 90° need further exploration, thus advanced echocardiographic examination is warranted.
Same case, 4 chamber view, more apical insonated.
Ventricle walls seem a bit thinner in this projection.
Clip showing a vessel originating from predomantly the right ventricle.
This vessel is forming the aortic arch, with a 2 vessel view.
Pulmonary artery is not visible in this sweep.
Abdomen, stomach at the left side of the fetus.
Cyst with echogenic wall just underneath the liver.
Aortic arch.
No ductal arch is visible.
The annulus and ascending part os this vessel is quite large, typical for a common arterial trunc (or Fallot).
To distinguish between common arterial trunc and Fallot with pulmonary atresia, it is necessary to identify the pulmonary ateries.
This clips shows the left and right pulmonary artery arising from the common trunc.
Thus this case is diagnosed with common arterial trunc.
This clips shows the trunc, including the left pulmonary artery.
Clip in duplex setting.
Color Doppler shows that the trunc receives blood from both the left and right ventricle (red).
The size of the VSD is not so big.