Antioxidant capacity of the human pericardial fluid: does gender have a role?

Area of Science:

• Cardiovascular Surgery
• Biochemistry
• Oxidative Stress

Background:

• Coronary heart disease (CHD) and valvular heart disease (VHD) require surgical intervention.
• Antioxidant defense mechanisms are crucial for myocardial protection during cardiac surgery.
• Gender-related differences in cardiovascular health and surgical outcomes are increasingly recognized.

Purpose of the Study:

• To evaluate antioxidant capacity in serum and pericardial fluid of patients undergoing heart surgery.
• To investigate gender-specific variations in antioxidant defense in cardiac surgery patients.
• To explore the role of pericardial fluid in myocardial antioxidant defense.

Main Methods:

• Analysis of serum and pericardial fluid from 85 patients (50 CHD, 35 VHD) during elective heart surgery.
• Measurement of total protein, albumin, uric acid, and antioxidant capacity using two independent techniques.
• Comparison of antioxidant levels between serum and pericardial fluid, and between genders.

Main Results:

• Pericardial fluid exhibited lower antioxidant capacity than serum, yet remained substantial.
• No significant differences in antioxidant capacity were observed between CHD and VHD patient groups.
• Male patients demonstrated significantly higher concentrations of uric acid, albumin, and total protein in pericardial fluid compared to females.

Conclusions:

• Pericardial fluid contributes to the local antioxidant defense of the myocardium.
• Male gender appears to confer an advantage in pericardial antioxidant defense.
• The observed gender-related differences warrant further investigation regarding perioperative complications and long-term cardiovascular mortality in women.