Antithrombin activity and outcomes in patients undergoing cardiac surgery with cardiopulmonary bypass

Area of Science:

• Cardiovascular Surgery
• Anesthesiology
• Hematology

Background:

• Antithrombin (AT) activity is crucial for anticoagulation during cardiopulmonary bypass (CPB).
• Previous studies showed limited correlation between baseline parameters and post-CPB AT activity.
• Understanding factors influencing post-CPB AT is vital for optimizing patient safety.

Purpose of the Study:

• To investigate the relationship between patient characteristics, CPB, and post-CPB AT activity in a larger cohort.
• To identify predictors of decreased post-CPB AT activity.
• To explore the association between post-CPB AT activity and clinical outcomes.

Main Methods:

• Prospective analysis of 250 patients undergoing elective cardiac surgery with CPB.
• Collection of sociodemographic, pre-CPB clinical data, and pre/post-CPB AT activity.
• General linear models, univariate, and multivariate analyses were employed.

Main Results:

• A significant decrease in post-CPB AT activity was observed (95.6% to 64.6%).
• Age was inversely correlated with post-CPB AT activity (approx. 1% decrease per 3 years).
• Univariate analysis indicated inverse relationships between post-CPB AT activity and complications, but multivariate analysis lacked statistical significance.

Conclusions:

• Post-CPB AT activity significantly declines following cardiac surgery.
• Patient age is a key factor associated with reduced post-CPB AT activity.
• Low post-CPB AT activity may influence surgical outcomes, warranting further investigation.