Growth hormone and insulin like growth factor-1 in patients with heart failure due to dilated cardiomyopathy

ABSTRACT

The aim of this study was to evaluate the level of growth hormone [GH] and insulin like growth factor-1 [IGF-1] in patients with heart failure due to idiopathic dilated cardiomyopathy to find out if the development or progression of heart failure is associated with a derangement of GH and IGF-1. The study was conducted on 30 patients with congestive heart failure due to dilated cardiomyopathy and 7 normal healthy subjects as a control group. The results revealed a significant increase in the serum levels of GH and a significant low serum IGF-1 and albumin in the patients as compared with the control group. Then, the patients were classified according to the NYHA functional classes into four classes [I, II, III and IV]. Sixteen patients were found in functional class IV. There were no differences in the results of this class and the whole patients group, suggesting that class IV represented the whole patient group studied. The study concluded that the serum levels of GH were increased and the serum levels of IGF-1 were diminished in patients with heart failure due to dilated cardiomyopathy. These abnormalities in GH and IGF-1 may have many etiological factors. Abnormalities of GH/IGF-1 axis might have a role either in the development or the progression of heart failure in dilated cardiomyopathy