Arterial lactate level changes in first day after cardiac operation.

Area of Science:

• Cardiology
• Critical Care Medicine
• Biochemistry

Background:

• Lactate level is a key predictor of cardiac events.
• Debates exist regarding optimal timing and type of lactate sampling for prognostic value.
• Arterial lactate monitoring post-cardiac surgery requires further investigation for its prognostic significance.

Purpose of the Study:

• To evaluate the prognostic importance of serial arterial lactate levels in patients undergoing cardiac surgery.
• To correlate lactate levels with intraoperative and postoperative factors.
• To assess the association between persistent high lactate levels and patient outcomes.

Main Methods:

• Serial arterial lactate levels were measured during and up to 24 hours after cardiac surgery in 31 patients.
• Data were analyzed using T-independent tests and chi-square tests.
• Statistical significance was set at P < 0.01.

Main Results:

• 80% of patients exhibited high arterial lactate levels (1.5-4 mmol/L) during surgery.
• 75% of patients normalized lactate levels (<1.5 mmol/L) by 12 hours post-operation.
• Persistent high lactate levels (>4 mmol/L) at 24 hours were uncommon but associated with poor prognosis.

Conclusions:

• Serial lactate measurements aid in assessing management quality post-cardiac surgery.
• Very high persistent arterial lactate levels (>4 mmol/L) at 24 hours post-operation increase mortality risk in congenital heart disease patients.
• Arterial lactate monitoring provides valuable prognostic information in cardiac surgery patients.