Hyperglycaemia increases S100β after short experimental cardiac arrest
M Molnar1, M Bergquist, A Larsson
1Department of Surgical Sciences, Section of Anesthesiology and Intensive Care, Uppsala University Hospital, Uppsala, Sweden.
Acta Anaesthesiologica Scandinavica
|October 15, 2013
Summary
Hyperglycaemia exacerbates brain injury following cardiac arrest. Elevated S100β levels in hyperglycaemic pigs suggest increased cerebral damage compared to normoglycaemic pigs after resuscitation.
Area of Science:
- Neuroscience
- Cardiovascular Research
- Metabolic Studies
Background:
- Hyperglycaemia is known to worsen ischemic brain injury.
- Understanding the impact of blood glucose levels on cerebral perfusion during and after cardiac arrest is critical.
Purpose of the Study:
- To investigate the effects of high (hyperglycaemic) versus normal (normoglycaemic) blood glucose levels on cerebral perfusion during a 5-minute cardiac arrest.
- To assess the impact of these conditions on biochemical markers of brain injury and inflammation.
Main Methods:
- Twenty pigs were divided into high (8.5-10 mM) and normal (4-5.5 mM) glucose groups.
- Both groups underwent 5 minutes of cardiac arrest, followed by 8 minutes of cardiopulmonary resuscitation and defibrillation.
- Cerebral perfusion, haemodynamics, and biochemical markers (S100β, IL-6, TNF) were monitored for 3 hours.
Main Results:
- Haemodynamics and physiological measurements were similar between the hyperglycaemic and normoglycaemic groups.
- S100β levels significantly increased in the high glucose group compared to the normal group (P < 0.05).
- Interleukin-6 and tumour necrosis factor levels increased in both groups but showed no significant difference between them.
Conclusions:
- The increased S100β response in hyperglycaemic pigs indicates heightened cerebral injury following cardiac arrest and resuscitation.
- Hyperglycaemia appears to exacerbate brain damage, while inflammatory cytokine responses were comparable between groups.
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