[Angiotensin converting enzyme index increases after open cardiac surgery]

Area of Science:

• Cardiovascular Science
• Pulmonary Medicine
• Surgical Research

Context:

• Investigating pulmonary endothelial cell integrity post-surgery is crucial for patient outcomes.
• Open cardiac, open chest, and head-neck surgeries present different physiological stresses.
• Pulmonary perfusion significantly influences serum markers, necessitating adjustments for accurate assessment.

Purpose:

• To determine if pulmonary endothelial cells are damaged following open cardiac, open chest, or head-neck surgery.
• To evaluate the utility of serum angiotensin converting enzyme (ACE) and the ACE index in detecting such damage.
• To compare the sensitivity of ACE and ACE index as early clinical markers of endothelial dysfunction.

Summary:

• Serum ACE levels did not differ significantly among the three surgical groups.
• The ACE index, adjusted for cardiac output, was significantly elevated after open cardiac surgery compared to open chest and head-neck surgery.
• This suggests the ACE index effectively detects endothelial damage from reperfusion injury post-cardiopulmonary bypass.

Impact:

• The ACE index serves as a more sensitive early clinical marker for pulmonary endothelial cell damage than serum ACE alone.
• Findings highlight the potential of the ACE index in monitoring patients undergoing procedures involving cardiopulmonary bypass.
• This research contributes to understanding and managing perioperative lung injury.