The proband carries a chromosomal inversion in chromosome 6.Representative G banded chromosomes from the proband. Enlarged chromosome 6 is shown at the left. The karyotype represents a p21.3 in chromosome 6 invasion with p23 <46, XX, inv (6) (p21.3p23)>. An ideogram of chromosome 6 is shown. The breakpoints are indicated in the ideogram.

The proband carries a chromosomal inversion in chromosome 6.Representative G banded chromosomes from the proband. Enlarged chromosome 6 is shown at the left. The karyotype represents a p21.3 in chromosome 6 invasion with p23 <46, XX, inv (6) (p21.3p23)>. An ideogram of chromosome 6 is shown. The breakpoints are indicated in the ideogram.

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Congenital heart defects (CHDs) represent the most common human birth defects. Ventricular septal defect (VSD) is the most common subtype of CHDs. It has been shown that about 20–40% of VSDs are closely related to chromosomal aneuploidies or Mendelian diseases. In this study, we report a pedigree with VSD associated with a balanced paracentric inve...