OXYGEN UPTAKE OF BLOOD IN PATIENTS WITH ISCHEMIC HEART DISEASE AFTER MYOCARDIAL REVASCULARIZATION

Abstract

Oxidative stress, which is observed in patients with coronary artery disease (CAD), is accompanied by the changes of plasma redox regulation. We aimed to investigate the dynamics of blood oxygen uptake rates in patients with CAD following coronary artery bypass graft surgery. We examined 80 CAD patients at admission to the hospital, discharge and 6 months after surgery. Patients were divided into three groups: Group 1 - 8 patients with acute coronary syndrome (ACS), Group 2 - 61 patients with old myocardial infarction (old MI), Group 3 - 11 patients with chronic CAD (CCAD). 24 healthy donors were included in the control group. We modelled the processes of lipid peroxidation (LPO) in plasma using biological oxygen monitor. The increase of indicators of blood oxygen uptake was registered in ACS and old MI patients at the day of admission, old MI patients at the day of discharge from the hospital, and CCАD patients at the day of 6 months after surgery. The increase of these indicators occurred after the depletion of blood antioxidant systems and caused by activation of lipoprotein peroxidation on the minute 30 and the decline of lipid radicals formation on the minute 40. As the plasma antioxidant status was greater, the оxidative damage of lipids started on the minute 40 of the study.

Keywords

• coronary artery disease
• myocardial revascularization
• blood oxygen uptake
• lipid pero- xidation