Fig 1. Oxidative DNA damage in different age hearts analyzed by mtDNA copy number.
qRT-PCR was used to analyze the levels of mtDNA in VSD patient hearts. mtDNA was not positively correlated with age, although group B (7–12 mo) had the highest amount of mtDNA. Bars indicate mean ±standard deviation. Both ANOVA and SNK were performed to evaluate statistical significance, n = 20, **p < 0.01.