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Release of adenylate kinase into cerebrospinal fluid during open-heart surgery and its relation to postoperative
Insights
Open-heart surgery can cause brain cell injury, leading to elevated adenylate kinase (AK) levels in cerebrospinal fluid (CSF). Measuring CSF-AK may help improve surgical outcomes and patient brain health.
Area of Science:
- Neurology
- Biochemistry
- Cardiovascular Surgery
Background:
- Cardiopulmonary bypass during open-heart surgery is associated with potential neurological complications.
- Biomarkers are needed to assess brain-cell injury during cardiac procedures.
Purpose of the Study:
- To investigate the relationship between cardiopulmonary bypass and brain-cell injury.
- To evaluate adenylate kinase (AK) levels in cerebrospinal fluid (CSF) as a potential indicator of neurological damage.
Main Methods:
- Cerebrospinal fluid (CSF) adenylate kinase (AK) levels were measured in patients undergoing open-heart surgery.
- CSF-AK levels were compared between patients with and without cardiopulmonary bypass.
- Preoperative and postoperative CSF-AK levels were analyzed in a subset of patients.
- Intellectual function was assessed and correlated with CSF-AK changes.
Main Results:
- Elevated CSF-AK levels were observed in 33 out of 36 patients undergoing open-heart surgery.
- No significant increase in CSF-AK was found in patients undergoing lung operations without cardiopulmonary bypass.
- A significant increase in CSF-AK correlated with a decline in intellectual function.
- No evidence of blood-brain barrier damage was detected.
Conclusions:
- Cardiopulmonary bypass during open-heart surgery is linked to brain-cell injury.
- Elevated CSF-AK levels indicate neurological damage.
- CSF-AK measurement is a promising tool for research aimed at enhancing open-heart surgery quality.
Abstract:
In 33 of 36 patients having open-heart surgery, the levels of adenylate kinase in cerebrospinal fluid (CSF-AK) were raised. No such increase was seen in 8 patients who had had lung operations without cardiopulmonary bypass. A significant increase in CSF-AK was recorded in 18 patients whose CSF was examined both preoperatively and postoperatively, and this increase was correlated with change in an index of intellectual function. Since there was no evidence of damage to the blood-brain barrier, these findings point to a causal relation between brain-cell injury during cardiopulmonary bypass and release of AK into CSF. Measurement of CSF-AK may therefore prove useful in research to improve the quality of open-heart surgery.