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Adrenomedullin and nitrite levels in children with dilated cardiomyopathy

M Kilinç1, A Balat, M Cekmen

  • 1Department of Pediatrics, Gaziantep University, Medical Faculty, Kolejtepe, 27070 Gaziantep, Turkey.

Pediatric Cardiology
|January 11, 2003
PubMed

Insights

Children with idiopathic dilated cardiomyopathy (DCM) have lower levels of adrenomedullin (AM), a key regulator of blood vessel function. This finding may help understand disease mechanisms in pediatric DCM.

Area of Science:

  • Pediatric Cardiology
  • Cardiovascular Physiology
  • Endocrinology

Background:

  • Dilated cardiomyopathy (DCM) is a significant cause of heart failure in children.
  • Endothelial vasomotor dysfunction is observed in idiopathic DCM.
  • While nitric oxide (NO) and adrenomedullin (AM) roles are studied in adult DCM, their levels in pediatric idiopathic DCM remain uninvestigated.

Purpose of the Study:

  • To determine plasma and urinary AM and total nitrite concentrations in children with idiopathic DCM.
  • To explore correlations between AM/nitrite levels and clinical/laboratory findings in pediatric DCM.

Main Methods:

  • Compared 11 children with idiopathic DCM to 10 healthy controls.
  • Measured plasma and urinary AM and total nitrite levels.
  • Analyzed correlations with ejection fraction (EF) and fractional shortening (FS).

Main Results:

  • Significantly lower plasma and urinary AM levels were found in children with DCM compared to controls (p < 0.001).
  • Decreased AM levels negatively correlated with ejection fraction and fractional shortening.
  • No significant difference in plasma or urinary nitrite levels was observed between DCM patients and controls (p > 0.05).

Conclusions:

  • This study, the first to analyze AM and nitrite in pediatric idiopathic DCM, reveals decreased AM levels.
  • Reduced AM may be linked to myocyte population depletion, warranting further investigation.
  • Findings contribute to understanding the pathophysiology of pediatric DCM.

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