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2 - How Do I Make an Epilepsy Diagnosis?

Published online by Cambridge University Press:  28 January 2023

Patrick Landazuri
Affiliation:
University of Kansas Medical Centre
Nuria Lacuey Lecumberri
Affiliation:
University of Texas Health Science Center, Houston
Laura Vilella Bertran
Affiliation:
University of Texas Health Science Center, Houston
Mark Farrenburg
Affiliation:
University of Kansas Medical Centre
Samden Lhatoo
Affiliation:
University of Texas Health Science Center, Houston
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Summary

A seizure is defined as abnormally coordinated electrical activity that is clinically noted as abnormal sensations, movements, or behaviors. Epilepsy is defined as the tendency to have seizures, practically as two unprovoked seizures at least 24 hours apart or one seizure with a 60% chance of additional seizures. The two overall epilepsy types are generalized and focal. Focal epilepsy most commonly indicates a focal brain injury like traumatic brain injury or tumor. In contrast, generalized epilepsy is due to a genetic etiology, not necessarily inherited. An epilepsy diagnosis is clinically made and can be supported by typical EEG and MRI findings. Nearly 4% of people develop epilepsy, with the largest peak during later years and the second peak during childhood. Nearly 70% of people are seizure-free after five years, whether via control with medications or, less commonly, the epilepsy itself remits. Life expectancy for epilepsy patients is lower. A key contributor to epilepsy mortality is sudden unexpected death in epilepsy (SUDEP). Uncontrolled generalized tonic clonic seizures are a key risk factor for SUDEP.

Type
Chapter
Information
Seizure and Epilepsy Care
The Pocket Epileptologist
, pp. 23 - 40
Publisher: Cambridge University Press
Print publication year: 2023

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References

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