Clinical significance of SBI
To identify the clinical significance of SBI, Knipp et al. evaluated new-onset SBI and postoperative cerebral function after on-pump CABG surgeries by MRI. Moreover, they reported that in the group with SBI, cognitive deterioration was observed during the acute postoperative period compared to the group without SBI 8. Sun et al. showed that postoperative delirium was associated with SBI5. This condition can occur when SBI occurs in the frontal lobe or in areas correlated to cortical speech or mental activity. Vermeer et al. 9 revealed that the risk of dementia increased with spontaneous SBI, and the decline in cognitive function was steep. The occurrence of SBI after cardiac surgery may also affect long-term life expectancy and healthy life expectancy. In the current study postoperative delirium and the cognitive function was not quantified. We believe further research and follow-up are required for patients with postoperative SBI.