“…In our study, only five adult patients with VSD were included; this subgroup was too small to perform a separate statistical analysis. In contrast, in most other studies on oxidative stress in the blood of patients with CHD, indirect nonspecific markers of oxidative stress [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 ] were used, e.g., the assessment of the activity of oxidative and antioxidant enzymes (superoxide dismutase (SOD), catalase and glutathione peroxidase), levels of antioxidants (vitamin E, uric acid and selenium), levels of malondialdehyde (MDA) and protein carbonyl (PCO), plasma total oxidant status (TOS), total antioxidant capacity or status (TAC or TAS) and oxidative stress index (OSI) as well as the quantification of DNA damage assessed by alkaline comet assay in circulating lymphocytes and levels of 8-hydroxy-2′-deoxyguanosine.…”