SOD1 and myocardial ischemia: The higher levels of SOD in IHD + H as compared to healthy controls (Table 1) probably reflect an effort of SOD to counteract the excessive oxidant stress present in IHD + H. Similarly, the higher salivary GPx levels in disease groups of IHD + CP, IHD + H, and CP as compared to the healthy controls (Table 3) could probably be a result of a compensatory increase of GPx to the oxidant stress in diseased states.