23rd September 2021

A newborn male is resuscitated on the neonatal unit

A newborn male is resuscitated on the neonatal unit. He was born prematurely at 35 weeks via spontaneous vaginal delivery, and there were no complications during the delivery. However, in his antenatal scans, the right atrium was identified as severely dilated, with an apical displacement of the tricuspid valve. There were no interseptal abnormalities. He has no significant family history. On examination, he is tachycardic, tachypnoeic, and there is a pansystolic murmur.

Which of the following is the most likely underlying diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.