Prenatal and postnatal chromosomal microarray analysis in 885 cases of various congenital heart defects

Liat Salzer-Sheelo*, Uri Polak, Ayelet Barg, Sarit Kahana, Shiri Yacobson, Ifaat Agmon-Fishman, Cochava Klein, Reut Matar, Noa Rurman-Shahar, Lena Sagi-Dain, Lina Basel-Salmon, Idit Maya, Rivka Sukenik-Halevy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: This study aimed to evaluate the prevalence of clinically significant (pathogenic and likely pathogenic) variants detected by chromosomal microarray (CMA) tests performed for prenatally and postnatally detected congenital heart defects. Methods: A retrospective evaluation of CMA analyses over a period of four years in a single tertiary medical center was performed. Detection rate of clinically significant variants was calculated in the whole cohort, prenatal vs. postnatal cases, and isolated vs. non-isolated CHD. This rate was compared to previously published control cohorts, and to a theoretical detection rate of noninvasive prenatal testing (NIPS; 5 chromosomes). Results: Of the 885 cases of CHD, 111 (12.5%) clinically significant variants were detected, with no significant difference between the 498 prenatal and the 387 postnatal cases (10.8% vs. 14.7%, p = 0.08). In both groups, the detection rate was significantly higher for non-isolated vs. isolated CHD (76/339 = 22.4% vs. 35/546 = 6.4%, respectively, p < 0.05). The detection rate was higher than the background risk in both groups, including cases of postnatal isolated CHD. 44% of abnormal findings in the prenatal setting would be detectable by NIPS. Conclusion: CMA should be performed for both prenatally and postnatally detected CHD, including postnatal cases of isolated CHD, while NIPS can be considered in specific scenarios.

Original languageEnglish
JournalArchives of Gynecology and Obstetrics
DOIs
StatePublished - Oct 2022

Funding

FundersFunder number
Ministerio de Sanidad, Consumo y Bienestar Social

    Keywords

    • Chromosomal microarray analysis
    • Congenital heart defects
    • Postnatal
    • Prenatal

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