Ductal-dependent congenital heart defects typically present with which finding in the neonatal period?

• A. Respiratory distress
• B. Cyanosis
• C. Jaundice
• D. Hypotension

Answer: (A)

When a newborn has a ductal-dependent congenital heart defect, the ductus arteriosus must remain open to maintain adequate blood flow either to the lungs or to the body. After birth, the ductus normally closes, and in these defects that closure abruptly diminishes vital circulation. The most consistent early clue is respiratory distress: the infant struggles to oxygenate and ventilate effectively as pulmonary blood flow becomes inadequate or systemic perfusion drops, so tachypnea, retractions, and increased work of breathing develop quickly. Cyanosis can occur, especially in lesions with poor pulmonary flow, but the immediate and common sign in the neonatal period is respiratory distress due to the sudden hemodynamic change after ductal closure. Jaundice is not related to this issue, and hypotension can occur later or in specific lesions, but it’s not the typical early clue across these defects.