Podcast
Questions and Answers
What is the revised duration category for intermediate duration as defined by the International League Against Epilepsy?
What is the revised duration category for intermediate duration as defined by the International League Against Epilepsy?
What was the previous voltage categorization for high amplitude before the recent changes?
What was the previous voltage categorization for high amplitude before the recent changes?
In the recent changes, what is the new range of voltage defined for medium amplitude?
In the recent changes, what is the new range of voltage defined for medium amplitude?
Which of the following categories has been changed from a major modifier to a minor modifier?
Which of the following categories has been changed from a major modifier to a minor modifier?
Signup and view all the answers
What is the defined range for long duration according to the changes made?
What is the defined range for long duration according to the changes made?
Signup and view all the answers
Which voltage category is newly added for high activity?
Which voltage category is newly added for high activity?
Signup and view all the answers
What is the revised categorization for high voltage activity?
What is the revised categorization for high voltage activity?
Signup and view all the answers
What change was made to the long duration category in the recent revisions?
What change was made to the long duration category in the recent revisions?
Signup and view all the answers
What aspect of EEG findings was highlighted as an important distinction in some circumstances?
What aspect of EEG findings was highlighted as an important distinction in some circumstances?
Signup and view all the answers
What major change combined ‘variability’ and ‘Stage II sleep transients’ in the 2021 terminology?
What major change combined ‘variability’ and ‘Stage II sleep transients’ in the 2021 terminology?
Signup and view all the answers
What is the new term introduced for the Cyclic Alternating Pattern of Encephalopathy in the 2021 changes?
What is the new term introduced for the Cyclic Alternating Pattern of Encephalopathy in the 2021 changes?
Signup and view all the answers
Which frequency criterion distinguishes electrographic seizures from PDs or SWs?
Which frequency criterion distinguishes electrographic seizures from PDs or SWs?
Signup and view all the answers
What does a typical frequency of .4 Hz and a duration of less than 0.5 seconds indicate?
What does a typical frequency of .4 Hz and a duration of less than 0.5 seconds indicate?
Signup and view all the answers
Under the revised terminology, how is the evolution of an RPP defined?
Under the revised terminology, how is the evolution of an RPP defined?
Signup and view all the answers
What would qualify a pattern as a BIRD based on its definition?
What would qualify a pattern as a BIRD based on its definition?
Signup and view all the answers
What is indicated by a lateralized (bilateral asynchronous) pattern?
What is indicated by a lateralized (bilateral asynchronous) pattern?
Signup and view all the answers
If an RPP has a typical frequency of 0.5 Hz and lasts 10 seconds, what does it qualify as?
If an RPP has a typical frequency of 0.5 Hz and lasts 10 seconds, what does it qualify as?
Signup and view all the answers
What does 'identical bursts' refer to in the 2021 terminology?
What does 'identical bursts' refer to in the 2021 terminology?
Signup and view all the answers
Which major term refers to patterns exhibiting bilateral asynchronous characteristics?
Which major term refers to patterns exhibiting bilateral asynchronous characteristics?
Signup and view all the answers
What is the new predominant background frequency that has been added to EEG analysis?
What is the new predominant background frequency that has been added to EEG analysis?
Signup and view all the answers
When describing 'Highly Epileptiform Bursts', how has the criteria changed regarding the number of epileptiform discharges?
When describing 'Highly Epileptiform Bursts', how has the criteria changed regarding the number of epileptiform discharges?
Signup and view all the answers
What is the new term that refers to rhythmic discharges that might be linked to seizure activity?
What is the new term that refers to rhythmic discharges that might be linked to seizure activity?
Signup and view all the answers
How has the definition of burst suppression changed regarding attenuation and suppression percentage?
How has the definition of burst suppression changed regarding attenuation and suppression percentage?
Signup and view all the answers
What modifier is associated with the term 'Stimulus-Terminated'?
What modifier is associated with the term 'Stimulus-Terminated'?
Signup and view all the answers
In the context of electroclinical seizure activity, what term signifies a possible but unconfirmed state of seizure?
In the context of electroclinical seizure activity, what term signifies a possible but unconfirmed state of seizure?
Signup and view all the answers
Which of the following describes the change in the definition of 'nearly continuous' EEG background?
Which of the following describes the change in the definition of 'nearly continuous' EEG background?
Signup and view all the answers
What new term refers to a continuum observed during seizure activity?
What new term refers to a continuum observed during seizure activity?
Signup and view all the answers
What is the new term for prolonged seizure activity characterized by electrographic patterns?
What is the new term for prolonged seizure activity characterized by electrographic patterns?
Signup and view all the answers
What is the new voltage definition for medium amplitude after the recent revisions?
What is the new voltage definition for medium amplitude after the recent revisions?
Signup and view all the answers
What is the revised definition for long duration according to the new changes?
What is the revised definition for long duration according to the new changes?
Signup and view all the answers
Which statement accurately describes the changes made to the categories of voltage?
Which statement accurately describes the changes made to the categories of voltage?
Signup and view all the answers
What aspect of EEG findings was adjusted from a major modifier to a minor modifier?
What aspect of EEG findings was adjusted from a major modifier to a minor modifier?
Signup and view all the answers
In current nomenclature, what has the definition of intermediate duration been adjusted to?
In current nomenclature, what has the definition of intermediate duration been adjusted to?
Signup and view all the answers
What is one of the significant changes regarding RPP frequency in the 2021 terminology?
What is one of the significant changes regarding RPP frequency in the 2021 terminology?
Signup and view all the answers
In the revised terminology, how is the concept of 'evolution' defined for RPPs?
In the revised terminology, how is the concept of 'evolution' defined for RPPs?
Signup and view all the answers
What does the term 'lateralized (bilateral asynchronous)' signify in the context of EEG findings?
What does the term 'lateralized (bilateral asynchronous)' signify in the context of EEG findings?
Signup and view all the answers
Which criteria now differentiates an electrographic seizure from patterns classified as PDs or SWs?
Which criteria now differentiates an electrographic seizure from patterns classified as PDs or SWs?
Signup and view all the answers
What defines an RPP as a BIRD under the revised terminology?
What defines an RPP as a BIRD under the revised terminology?
Signup and view all the answers
What does the new term 'identical bursts' refer to in the updated EEG terminology?
What does the new term 'identical bursts' refer to in the updated EEG terminology?
Signup and view all the answers
What major change has occurred regarding the term 'Cyclic Alternating Pattern of Encephalopathy' in the 2021 terminology?
What major change has occurred regarding the term 'Cyclic Alternating Pattern of Encephalopathy' in the 2021 terminology?
Signup and view all the answers
What is the new term for a potential state of seizure that is not definitively diagnosed?
What is the new term for a potential state of seizure that is not definitively diagnosed?
Signup and view all the answers
Which of the following changes was made to the definition of burst suppression?
Which of the following changes was made to the definition of burst suppression?
Signup and view all the answers
What is the revised criteria for classifying highly epileptiform bursts?
What is the revised criteria for classifying highly epileptiform bursts?
Signup and view all the answers
What has been added to the predominant background frequency category of EEG?
What has been added to the predominant background frequency category of EEG?
Signup and view all the answers
Which of the following is correctly identified as a new term related to ongoing seizure patterns?
Which of the following is correctly identified as a new term related to ongoing seizure patterns?
Signup and view all the answers
What does the new guideline specify about defining continuity in EEG background?
What does the new guideline specify about defining continuity in EEG background?
Signup and view all the answers
Which term has been introduced to describe brief potentially ictal rhythmic discharges?
Which term has been introduced to describe brief potentially ictal rhythmic discharges?
Signup and view all the answers
What is the new upper limit defined for burst suppression in EEG analysis?
What is the new upper limit defined for burst suppression in EEG analysis?
Signup and view all the answers
Which of the following describes a significant change regarding EEG background continuity?
Which of the following describes a significant change regarding EEG background continuity?
Signup and view all the answers
Study Notes
Major Changes in EEG Terminology
- EEG background terms have been updated to combine "variability" and "Stage II sleep transients" under "state changes."
- Introduction of the term "Cyclic Alternating Pattern of Encephalopathy (CAPE)" as a new entry in Section A7.
- New terminology includes "identical bursts" in Section A4d.
Rhythmic and Periodic Patterns (RPPs)
- "Unilateral Independent (UI)" is a new option in Main Term 1 (Section C1d).
- "Lateralized (bilateral asynchronous)" patterns are now defined to include those starting in one hemisphere and propagating to another.
- PDs (Periodic Discharges) and SW (Spike-Wave) patterns have stipulated criteria: a frequency of 2.5 Hz is defined as very brief (<10 s) for RPPs; longer durations classify them as electrographic seizures.
- RPPs cannot have typical frequencies ≤4 Hz; such patterns lasting under 0.5 s do not qualify as RPPs but may be polyspikes.
Evolution Criteria
- Evolution in RPPs is confined to those patterns ≤4 Hz with durations <10 s.
- RPPs with evolution lasting ≥10 s are classified as electrographic seizures (criterion B).
New Terminology for Seizure Activity
- New terms include:
- Electrographic seizure (ESz)
- Electrographic status epilepticus (ESE)
- Electroclinical seizure (ECSz)
- Electroclinical status epilepticus (ECSE)
- Possible electroclinical status epilepticus (Section D4b)
- Brief Potentially Ictal Rhythmic Discharges (BIRDs)
- Ictal-Interictal Continuum (IIC)
Minor Changes in EEG Terminology
- Beta frequency (≥13 Hz) added to predominant background frequency.
- Nearly continuous EEG updated from #10% to 1–9% attenuation/suppression.
- Burst suppression criteria modified from ≥50% to 50–99% attenuation/suppression.
- Voltage categories now include high voltage (>150 mV).
Updates in Rhythmic and Periodic Pattern Definitions
- Intermediate duration for rhythms adjusted from 1–4.9 minutes to 1–9.9 minutes.
- Long duration changed from 5–59 minutes to 10–59 minutes.
- Revised voltage categorization: medium voltage now defined as 50–149 mV; high voltage ≥150 mV.
- Polarity is redefined from a major modifier to a minor modifier.
Compatibility with Existing Glossaries
- Changes align with the 2017 multinational revised glossary of terms used in clinical electroencephalography.
Major Changes in EEG Terminology
- EEG background terms have been updated to combine "variability" and "Stage II sleep transients" under "state changes."
- Introduction of the term "Cyclic Alternating Pattern of Encephalopathy (CAPE)" as a new entry in Section A7.
- New terminology includes "identical bursts" in Section A4d.
Rhythmic and Periodic Patterns (RPPs)
- "Unilateral Independent (UI)" is a new option in Main Term 1 (Section C1d).
- "Lateralized (bilateral asynchronous)" patterns are now defined to include those starting in one hemisphere and propagating to another.
- PDs (Periodic Discharges) and SW (Spike-Wave) patterns have stipulated criteria: a frequency of 2.5 Hz is defined as very brief (<10 s) for RPPs; longer durations classify them as electrographic seizures.
- RPPs cannot have typical frequencies ≤4 Hz; such patterns lasting under 0.5 s do not qualify as RPPs but may be polyspikes.
Evolution Criteria
- Evolution in RPPs is confined to those patterns ≤4 Hz with durations <10 s.
- RPPs with evolution lasting ≥10 s are classified as electrographic seizures (criterion B).
New Terminology for Seizure Activity
- New terms include:
- Electrographic seizure (ESz)
- Electrographic status epilepticus (ESE)
- Electroclinical seizure (ECSz)
- Electroclinical status epilepticus (ECSE)
- Possible electroclinical status epilepticus (Section D4b)
- Brief Potentially Ictal Rhythmic Discharges (BIRDs)
- Ictal-Interictal Continuum (IIC)
Minor Changes in EEG Terminology
- Beta frequency (≥13 Hz) added to predominant background frequency.
- Nearly continuous EEG updated from #10% to 1–9% attenuation/suppression.
- Burst suppression criteria modified from ≥50% to 50–99% attenuation/suppression.
- Voltage categories now include high voltage (>150 mV).
Updates in Rhythmic and Periodic Pattern Definitions
- Intermediate duration for rhythms adjusted from 1–4.9 minutes to 1–9.9 minutes.
- Long duration changed from 5–59 minutes to 10–59 minutes.
- Revised voltage categorization: medium voltage now defined as 50–149 mV; high voltage ≥150 mV.
- Polarity is redefined from a major modifier to a minor modifier.
Compatibility with Existing Glossaries
- Changes align with the 2017 multinational revised glossary of terms used in clinical electroencephalography.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the ACNS Standardized Critical Care EEG Terminology with this quiz. It covers important changes between the 2012 and 2021 versions, including updates on EEG background and new terminology. Enhance your understanding of critical care EEG for professional practice.
