Book contents
- How to Read an EEG
- How to Read an EEG
- Copyright page
- Dedication
- Contents
- Figure Contributions
- Foreword
- Preface
- How to Read This Book
- Part I Basics
- Part II Interpretation
- Chapter 9 Approach to EEG Reading
- Chapter 10 Background
- Chapter 11 Foreground (How to Describe an Abnormality)
- Chapter 12 Common Artifacts
- Chapter 13 Normal Variants
- Chapter 14 Sporadic Abnormalities
- Chapter 15 Repetitive Abnormalities
- Chapter 16 Ictal Patterns (Electrographic Seizures)
- Chapter 17 Activation Procedures
- Part III Specific Conditions
- Appendix How to Write a Report
- Index
- References
Chapter 16 - Ictal Patterns (Electrographic Seizures)
from Part II - Interpretation
Published online by Cambridge University Press: 24 June 2021
Book contents
- How to Read an EEG
- How to Read an EEG
- Copyright page
- Dedication
- Contents
- Figure Contributions
- Foreword
- Preface
- How to Read This Book
- Part I Basics
- Part II Interpretation
- Chapter 9 Approach to EEG Reading
- Chapter 10 Background
- Chapter 11 Foreground (How to Describe an Abnormality)
- Chapter 12 Common Artifacts
- Chapter 13 Normal Variants
- Chapter 14 Sporadic Abnormalities
- Chapter 15 Repetitive Abnormalities
- Chapter 16 Ictal Patterns (Electrographic Seizures)
- Chapter 17 Activation Procedures
- Part III Specific Conditions
- Appendix How to Write a Report
- Index
- References
Summary
Ictal patterns represent ongoing electrographic seizures. They are recognized by their clinical accompaniments (may be subtle) and electrographic features. Evolution is the electrographic hallmark of an ictal pattern, plus features (such as overriding fast activity) also render a pattern more ictal in appearance. Electrographic seizures will typically have a clear onset, evolution and offset. Conventionally, they should last for greater than 10 seconds. Electrographic seizures are common in after convulsive seizures, acute brain injury and in critically ill patients with altered mentation. Continuous EEG monitoring is the preferred method of diagnosing electrographic seizures. Typically, a duration of 24 hours is sufficient, but this should be extended in certain high-risk populations.
- Type
- Chapter
- Information
- How to Read an EEG , pp. 149 - 159Publisher: Cambridge University PressPrint publication year: 2021
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