24th September 2021

A newborn presents with significant cyanosis at birth and symptoms of heart failure such as dyspnoea (4)

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. Immediate open-heart surgery is planned. What is the mortality rate of this type of surgical repair?

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