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  • Title: Improvement of cardiac performance and cardiovascular risk factors in children with GH deficiency after two years of GH replacement therapy: an observational, open, prospective, case-control study.
    Author: Salerno M, Esposito V, Farina V, Radetti G, Umbaldo A, Capalbo D, Spinelli L, Muzzica S, Lombardi G, Colao A.
    Journal: J Clin Endocrinol Metab; 2006 Apr; 91(4):1288-95. PubMed ID: 16403823.
    Abstract:
    CONTEXT: GH deficiency (GHD) in adults is associated with a cluster of cardiovascular risk factors that may contribute to an increased mortality for cardiovascular disease. OBJECTIVE: The aim of this study was to evaluate the effect of GHD and GH replacement therapy on cardiac performance, lipid profile, and insulin resistance in children. DESIGN: This was a 2-yr case-control prospective study. PATIENTS: Thirty children with GHD aged 9.3 +/- 0.5 yr and 30 healthy matched controls were studied. INTERVENTION: Children were studied before and after 1 and 2 yr of GH replacement (GHD children) or no treatment (controls). MAIN OUTCOME MEASURES: Lipid profile, serum insulin levels, homeostasis model of assessment (HOMA) index, and left ventricular (LV) mass and function by echocardiography were the main outcome measures. RESULTS: At study entry, the LV mass index was significantly lower in GHD children (50.2 +/- 1.7) than in controls (60.3 +/- 2.5 g/m(2); P < 0.002), whereas LV systolic and diastolic function, lipid profile, insulin levels, and HOMA index were similar. In GHD children LV mass index significantly increased (66.3 +/- 2.4 g/m(2); P < 0.0001) after 1 yr of GH replacement and remained stable thereafter. LV systolic and diastolic function did not change during treatment. After 2 yr of GH replacement, total cholesterol (P < 0.007) and the atherogenic index (P < 0.0001) significantly decreased, whereas fasting insulin levels (P < 0.001) and HOMA index (P < 0.0001) significantly increased compared with both pretreatment and control values. CONCLUSIONS: GHD in children is associated with a reduced cardiac size but with a normal cardiac function, lipid profile, and insulin sensitivity. Two years of GH replacement normalizes cardiac morphology, improves lipid profile, and slightly impairs insulin sensitivity.
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