PON1 and brain infarction: Circulating levels of oxidative stress markers (MDA, ROS, TBARS, and AOPP) were increased (P < 0.001) and antioxidative stress markers (SOD 1, SOD 2, SOD 3, and PON 1) were decreased (P < 0.001) in elderly patients with concomitant multiple brain infarcts and multiple chronic total coronary occlusions.