Characterizing the Subcortical Structures in Youth with Congenital Heart Disease

Area of Science:

• Neuroimaging
• Neuroscience
• Cardiology

Background:

• Congenital heart disease (CHD) is a primary cause of neurocognitive impairment.
• Subcortical structures are vital for cognitive functions, but their detailed anatomy in CHD is understudied.
• Existing research lacks comprehensive anatomic characterization of key subcortical structures in individuals with CHD.

Purpose of the Study:

• To compare the morphometry and volume of the globus pallidus, striatum, and thalamus.
• To investigate neuroanatomic differences between youth with CHD and healthy controls.
• To identify subtle structural alterations associated with CHD beyond volumetric changes.

Main Methods:

• Recruited 48 youth (16-24 years) with CHD (cardiopulmonary bypass before age 2) and 48 healthy controls.
• Acquired high-resolution 3D T1-weighted brain MRI scans for all participants.
• Utilized advanced MR imaging techniques for detailed morphometric and volumetric analysis.

Main Results:

• Found smaller surface area and inward displacement of the globus pallidus in the CHD group.
• Observed altered surface area and displacement in the thalami of individuals with CHD.
• Detected a significant volume reduction only in the right globus pallidus in the CHD group.

Conclusions:

• Morphometric alterations in the globus pallidus and thalamus are present in youth with CHD.
• Brain structure volume alone is insufficient to detect subtle neuroanatomic differences in CHD.
• Advanced imaging analysis is crucial for understanding neurocognitive impairment in congenital heart disease.