4.7 Article

The Impact of Nonconvulsive Status Epilepticus after Cardiac Surgery on Outcome

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JOURNAL OF CLINICAL MEDICINE
卷 11, 期 19, 页码 -

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MDPI
DOI: 10.3390/jcm11195668

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cardiac surgery; cardiopulmonary bypass; brain insult; nonconvulsive status epilepticus; conventional electroencephalography; seizures; outcome

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Neurological complications after heart surgery, such as nonconvulsive status epilepticus (NCSE), can lead to significant morbidity and mortality. This study aimed to determine the frequency and impact of NCSE after cardiac surgery. It found that NCSE occurred in a significant number of patients who underwent open heart surgery, and it was often associated with concurrent brain injury. Early EEG studies may be prudent to interrupt seizure activity and mitigate secondary cerebral injury.
Neurological complications after heart surgery are associated with tremendous morbidity and mortality. Nonconvulsive status epilepticus (NCSE), which can only be verified by EEG, may cause secondary brain damage. Its frequency and its impact on outcomes after cardiac surgery is still unclear. We collected the neurological files and clinical data of all our patients after heart surgery who, in the course of their ICU stay, had been seen by a neurologist who ordered an EEG. Within 18 months, 1457 patients had cardiac surgery on cardiopulmonary bypass. EEG was requested for 89 patients. Seizures were detected in 39 patients and NCSE was detected in 11 patients. Open heart surgery was performed in all 11 NSCE patients, of whom eight showed concomitant brain insults. None had a history of epilepsy. Despite the inhibition of seizure activity with antiseizure medication, clinical improvement was only noted in seven NCSE patients, three of whom were in cerebral performance category 2 and four in category 3 at hospital discharge. The four patients without neurological benefit subsequently died in the ICU. The occurrence of NCSE after open cardiac surgery is significant and frequently associated with brain injury. It seems prudent to perform EEG studies early to interrupt seizure activity and mitigate secondary cerebral injury.

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