Postoperative Improvement of Brain Maturation in Infants With Congenital Heart Disease

Area of Science:

• Pediatric Cardiology
• Neurodevelopmental Science
• Medical Imaging

Background:

• Severe congenital heart disease (CHD) poses risks for neurodevelopmental impairments in children.
• Neonatal cardiac surgery, including cardiopulmonary bypass and hybrid procedures for conditions like hypoplastic left heart syndrome, is a critical intervention for these infants.
• Understanding the impact of these interventions on brain maturation is crucial for long-term outcomes.

Purpose of the Study:

• To investigate and compare brain maturation in infants with severe CHD undergoing neonatal cardiac surgery versus healthy controls.
• To assess the progression of brain maturation from pre- to post-operative assessments in infants with CHD.
• To explore the correlation between brain maturation scores and neurodevelopmental outcomes at one year of age.

Main Methods:

• A prospective cohort study involving term-born infants with CHD (n=92) and healthy controls (n=46).
• Cerebral MRI scans were performed pre- and post-operatively for CHD infants, with healthy infants serving as controls.
• Brain maturation was quantified using a semiquantitative scoring system, and neurodevelopment was assessed at 1 year using the Bayley Scales of Infant and Toddler Development III.

Main Results:

• Infants with CHD demonstrated lower pre- and post-operative brain maturation scores compared to controls, even after adjusting for postmenstrual age.
• A significant increase in brain maturation scores was observed between pre- and post-operative assessments in the CHD group (P ≤ 0.001).
• Brain maturation scores did not correlate with neurodevelopmental outcomes at 1 year when corrected for socioeconomic status and postmenstrual age at MRI.

Conclusions:

• This study confirms delayed brain maturation in infants with severe CHD.
• Despite neonatal cardiac surgery and intensive care, brain maturation continues post-operatively, though it remains delayed compared to healthy peers.
• Further research combining advanced MRI techniques with clinical methods is encouraged for improved outcome prediction in this vulnerable population.