Promising effects of xanthine oxidase inhibition by allopurinol on autonomic heart regulation estimated by heart rate variability (HRV) analysis in rats exposed to hypoxia and hyperoxia - Fig 3

<p><b>Effect of XO inhibition by allopurinol on markers of oxidative stress in plasma: 8-isoprostanes (A) and protein carbonyl group (B).</b> Blue bar indicates control group, orange bar–rats treated with allopurinol. Data shown as Mean ± SEM according to Student t-test, * p<0.05, NS–not significant, allopurinol vs. control group.