Introduction
Cardiac surgery regularly provokes inflammation and oxidative stress which contribute to the development of organ failure and mortality of patients. While the assessment of single markers does not reflect a comprehensive investigation of redox status, the measurement of oxidation-reduction potential (ORP) provides a reliable measure to assess the balance between total prooxidant and antioxidant balance in the blood. The aim of the present study was to investigate the overall redox potential in patients undergoing cardiac surgery.