Relationship Between Cavum Septi Pellucidi Measurements and Fetal Hypoplastic Left Heart Syndrome or Dextro-Transposition of the Great Arteries

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Abstract

Objectives

The aim of this study was to compare the size and position of the cavum septi pellucidi (CSP) in fetuses with hypoplastic left heart syndrome (HLHS) or dextro-transposition of the great arteries (D-TGA) with healthy fetuses.

Methods

The CSP length, CSP width, and frontal lobe length were measured in 185 healthy fetuses (404 scans), 11 fetuses with HLHS (16 scans), and 11 fetuses with D-TGA (12 scans) between January 2005 and April 2016. Each measurement was compared between healthy fetuses and those with HLHS or D-TGA, controlling for the biparietal diameter.

Results

Positive correlations were noted between biparietal diameter and CSP length, CSP width, and frontal lobe length (adjusted R2 = 0.811, 0.821, and 0.878, respectively). An increased CSP length was found in both fetuses with HLHS and those with D-TGA (P < .0001). The CSP width was only increased in fetuses with D-TGA (P = .0466). No difference in the frontal lobe length was noted.

Conclusions

In fetuses with HLHS, the CSP is increased in length. In fetuses with D-TGA, the CSP is increased in both length and width.

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