24th September 2021

A newborn presents with significant cyanosis at birth and symptoms of heart failure such as dyspnoea (2)

A newborn presents with significant cyanosis at birth and symptoms of heart failure such as dyspnoea. On auscultation of the heart, he has an ejection systolic murmur at the left sternal edge with a loud S2. He undergoes an echocardiogram which confirms a diagnosis of persistent truncus arteriosus (PTA). The echocardiogram reveals a ventricular septal defect with the right and left pulmonary arteries arising separately from the posterior aspect of the truncus. According to the Van Praagh classification, what type of PTA does this finding constitute?

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