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Related Concept Videos

Seizures l: Introduction01:20

Seizures l: Introduction

Understanding seizures and epilepsy relies on key definitions that help in recognizing, classifying, and managing these disorders. These definitions provide a framework for recognizing, classifying, and managing seizure disorders.DefinitionsA seizure is a sudden, abnormal burst of electrical activity in the brain that can cause changes in awareness, movement, sensation, or behavior, depending on the area involved. Epilepsy is a chronic condition characterized by recurrent, unprovoked seizures,...
Seizures: Classification01:13

Seizures: Classification

Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
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:
Seizures ll: Types01:19

Seizures ll: Types

Seizures are sudden bursts of abnormal electrical discharge in the brain that interfere with normal function. They are commonly divided into three groups: focal seizures, generalized seizures, and other types that do not fit neatly into either category.Focal SeizuresFocal seizures begin in a single brain region. When awareness is preserved, they are called focal aware seizures and may cause sensations such as tingling, unusual smells, or flashing lights. When awareness is impaired, they are...
Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Epilepsy ll: Types01:22

Epilepsy ll: Types

Recurrent seizures, stemming from abnormal electrical activity in the brain, are the defining characteristic of epilepsy, a chronic neurological condition. Because seizure features vary greatly, epilepsy is classified using two systems: by seizure type and by epilepsy syndromes. These classifications enable clinicians to describe seizure patterns and select suitable treatment strategies.I. Classification by Seizure Type1. Focal EpilepsyFocal epilepsy begins in one hemisphere of the brain.
Electroconvulsive Therapy01:30

Electroconvulsive Therapy

Electroconvulsive therapy (ECT), or shock therapy, remains a critical biomedical intervention for severe, treatment-resistant depression. While its origins can be traced back to Hippocrates' observations that malaria-induced convulsions alleviated mental illness, modern ECT has evolved significantly from its earlier, more primitive applications. First introduced in 1938 by Ugo Cerletti and his colleagues, ECT involves inducing controlled seizures using electrical currents. In its early years,...

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Nonconvulsive status epilepticus and coma.

Gerhard Bauer1, Eugen Trinka

  • 1Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria.

Epilepsia
|September 12, 2009
PubMed
Summary
This summary is machine-generated.

Diagnosing nonconvulsive status epilepticus (NCSE) in comatose patients requires electroencephalography (EEG). This review clarifies NCSE in coma, distinguishing typical NCSE from comatose NCSE (coma-LED/GED) for better treatment strategies.

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Area of Science:

  • Neurology
  • Epileptology
  • Critical Care Medicine

Background:

  • Nonconvulsive status epilepticus (NCSE) diagnosis in comatose patients is challenging without electroencephalography (EEG).
  • Continuous or periodic EEG abnormalities in advanced coma stages lack clear causal links to coma or established treatment guidelines.
  • The prognostic and therapeutic implications of epileptiform EEG patterns in comatose states are debated, with some viewing them as signs of a dying brain.

Purpose of the Study:

  • To review the current debate surrounding NCSE in comatose patients.
  • To critically analyze literature on epileptiform EEG patterns in coma, their prognosis, and treatment.
  • To propose a pragmatic classification differentiating NCSE proper from comatose NCSE (coma-LED/GED).

Main Methods:

  • Literature review and critical reassessment of existing studies on NCSE and coma.
  • Analysis of EEG findings in comatose patients with epileptiform abnormalities.
  • Classification of NCSE in coma based on EEG characteristics and clinical presentation.

Main Results:

  • NCSE in comatose patients is diagnosed solely by EEG.
  • A distinction is proposed between NCSE proper (with clinical signs) and comatose NCSE (coma-LED/GED) (deep coma without motor signs, diagnosed by EEG).
  • Coma-LED and coma-GED represent deep coma states with characteristic epileptiform EEG patterns, distinct from NCSE proper.

Conclusions:

  • EEG is essential for diagnosing NCSE in comatose individuals.
  • Differentiating NCSE proper from comatose NCSE (coma-LED/GED) can resolve terminological confusion.
  • This classification aids in understanding the prognostic and therapeutic implications of epileptiform EEG patterns in deep coma.