Truncus arteriosus (fetal echocardiogram)

Case contributed by Cathy Cluver


Tertiary review for fetal cardiac assessment

Patient Data

Age: Second trimester
Gender: Female

Four chamber view


The four chamber view shows left axis deviation.



Fetal echocardiography of truncus arteriosus on the 5 chamber view. The 1st truncal branch is clearly seen coming off posterior to the large trunk.

RVOT/3vv and 3vt


A single large trunk is seen to be giving rise to the pulmonary arteries and aorta.

Case Discussion

In truncus arteriosus, a single common artery arises from the heart and supplies coronary, pulmonary and systemic circulation. This case demonstrates the typical findings of truncus arteriosus on standard fetal echo views.

Images courtesy of Dr Simon Meagher

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