It was also reported that because 88% of the electrographic seizures had been detected within the first 24 hours, at least 24 hours of monitoring is required to detect
nonconvulsive seizures in patients with a coma (9).
Grant, "
Nonconvulsive seizures in patients presenting with altered mental status: an evidence-based review," Epilepsy & Behavior, vol.
Ongoing
nonconvulsive seizures originating from the left hemisphere were seen on continuous electroencephalography (EEG).
EEG monitoring continued throughout therapy and consistently showed marked generalized slowing consistent with a global or multifocal cerebral dysfunction, extreme delta brush pattern consistent with anti-NMDAr encephalitis (Schmitt et al., 2012) and abundant rhythmic delta activity suspicious for
nonconvulsive seizures. EEG consistently ruled out correlation between the dyskinetic movement and seizure activity.
They introduce EEG monitoring, including basic and advanced EEG patterns seen in specific and nonspecific encephalopathy,
nonconvulsive seizures, cerebrovascular disease, periodic EEG patterns, and controversial patterns on the ictal-interictal continuum.
Absence and simple partial seizures are
nonconvulsive seizures that produce an altered sense of consciousness.
