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The immunocompetence of children with congenital heart disease
Insights
Children with conotruncal malformations show reduced T cells and may have Di George syndrome, indicating an immunological basis for their increased infections. Congenital heart disease patients exhibit higher infection susceptibility.
Area of Science:
- Immunology
- Pediatrics
- Cardiology
Background:
- Congenital heart disease (CHD) is associated with increased infection risk.
- The immunological status of children with specific CHD types requires further investigation.
Purpose of the Study:
- To assess the immunocompetence in children with conotruncal malformations (CTM) and cardiac shunt lesions.
- To explore the potential link between CTM and Di George syndrome.
- To identify immunological factors contributing to infection susceptibility in CHD.
Main Methods:
- Studied immunocompetence in 18 children with CTM (tetralogy of Fallot, truncus arteriosus) and 22 with cardiac shunt lesions.
- Assessed T cell percentages, T helper cells, immunoglobulins (IgG, IgA), and complement levels (C3, C4).
- Reviewed clinical records for infection frequency and hospital admissions.
Main Results:
- Reduced total T cells and T helper cells observed in the CTM group; no T cell abnormalities in the shunt group.
- Facial dysmorphism suggestive of Di George syndrome found in 7/18 CTM cases.
- Humoral deficiencies (reduced IgG, IgA, C3, C4) present in both groups.
- High frequency of infections reported, with 61% of CTM and 32% of shunt group requiring hospitalization.
Conclusions:
- Patients with CTM may represent a spectrum of Di George syndrome.
- Children with CHD exhibit increased susceptibility to infections due to underlying immunological deficits.
- An immunological basis underlies the increased infection risk in pediatric CHD patients.
Abstract:
We studied the immunocompetence of 18 children with conotruncal malformations (13 with tetralogy of Fallot, 5 with truncus arteriosus) and 22 children with cardiac shunt lesions. There were reduced total T cell percentages and T helper cells in the conotruncal group but no T cell abnormality in the shunt group. Also, 7 of the 18 cases in the conotruncal group had facial dysmorphism reminiscent of the Di George syndrome. These results suggest that patients with conotruncal malformations fall into the wide spectrum of the Di George syndrome. There was some humoral deficiency in both groups with reduced levels of immunoglobulins IgG and IgA and low levels of complement C3 and C4. The clinical records showed a high frequency of infections. Hospital admissions for these episodes had occurred in 61% of the conotruncal group and 32% of the shunt group. Thus, there is an increased susceptibility to infection in children with congenital heart disease, and the predilection to infection has an immunological basis.