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Zinc and copper in congestive heart failure.

In this study serum zinc (Zn) and copper (Cu) levels in children with congestive heart failure (CHF) were evaluated. The mean serum Zn levels of the patients with CHF were 92.9 +/- 18.9 micrograms/100 ml, and they showed a significant decrease when compared to controls (p less than 0.05). The mean serum Cu levels, which were 173.6 +/- 26.6 micrograms/100 ml, showed a significant increase when compared to controls (p less than 0.001). After digoxin therapy, a significant increase in Zn levels and a significant decrease in Cu levels were observed.