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Rapid and severe rise in static and pulsatile intracranial pressures during a generalized epileptic seizure
1Department of Neurosurgery, St. Olav University Hospital, Trondheim, Norway. ole.solheim@ntnu.no
Abstract:
In a patient with no prior history of seizures we were able to record static (mean) intracranial pressure (ICP) and pulsatile ICP (mean ICP wave amplitude) continuously during a first-time generalized epileptic seizure. The patient experienced episodic headache five months after a subarachnoid haemorrhage. In order to rule out low-pressure hydrocephalus she was admitted for a 24-hour intracranial pressure registration. ICP parameters were normal prior to the seizure. We observed an immediate and enormous rise in both static (mean) ICP and pulsatile ICP (mean ICP wave amplitude). Mean ICP and ICP wave amplitude peaked at 93 mmHg and 22 mmHg, respectively. Pulsatile ICP remained elevated after normalization of static ICP and may indicate impairment of intracranial compliance even after the static ICP was normalized.
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Seizures: Classification
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types: