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Critical Pulmonary Stenosis — RACP Paediatrics MCQ

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ModerateCardiologyCritical Pulmonary StenosisRACP Paediatrics

A newborn is diagnosed with critical pulmonary stenosis. He is cyanotic with SpO2 of 70%. The ductus arteriosus is closing. What are the two key initial interventions?

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Correct answer: B — Prostaglandin E1 and urgent balloon valvuloplasty

Critical pulmonary stenosis is a duct-dependent pulmonary circulation. PGE1 infusion maintains ductal patency for systemic-to-pulmonary flow. Transcatheter balloon valvuloplasty is the definitive treatment and is performed urgently once the patient is stabilised.

Reference: RCH Melbourne – 2024 – Clinical Practice Guidelines: Critical Pulmonary Stenosis