Neurology
SYSTEMATIC REVIEW
● Sys. Review
Narrative review explores diagnostic controversies between status epilepticus and ictal-interictal continuum
Frontiers in Medicine
Published April 1, 2026
DOI ↗
This narrative review explores the diagnostic and therapeutic controversies surrounding the boundaries between status epilepticus (SE) and the ictal-interictal continuum (IIC). The review examines how the IIC challenges traditional EEG classification systems, creating a significant zone of uncertainty in clinical practice. Key areas of debate include the interpretation of ictality, assessment of treatment responsiveness, and evaluation of neuronal injury risk in these ambiguous EEG patterns.
The review does not report primary research findings, effect sizes, or statistical measures. No specific study population, sample size, intervention, comparator, or outcomes are detailed. The analysis focuses on summarizing existing controversies and paradoxes in the literature rather than presenting new data.
No safety or tolerability information is reported. The review acknowledges that the boundaries between SE and IIC remain uncertain and controversial, representing a major gap in current knowledge. Limitations include the narrative nature of the review and the absence of primary data or quantitative synthesis.
For clinical practice, this review highlights the persistent diagnostic challenges in distinguishing SE from IIC patterns. It underscores the need for cautious interpretation of ambiguous EEG findings and recognition of current knowledge gaps. The review serves as a summary of ongoing debates rather than providing definitive guidance.
A recent medical review paper looked at a challenging area in neurology: the unclear line between a dangerous condition called status epilepticus (SE) and a brain wave pattern called the ictal-interictal continuum (IIC). The IIC pattern sits between normal and clearly abnormal seizure activity, making it hard for doctors to diagnose and decide on treatment.
The paper discusses why this gray area exists. It explores controversies, like how to interpret these brain wave patterns, whether they respond to seizure medications, and if they cause brain damage. The authors did not conduct a new study with patients or report specific safety data. Instead, they summarized existing debates among experts.
It's important to know this is a narrative review. That means it is a discussion of ideas and knowledge gaps, not a report of new scientific findings or treatment recommendations. The main point is that this area remains uncertain and controversial in medical practice. Readers should understand that this paper clarifies the questions doctors are asking, not the answers they have found.
What this means for you: A review paper discusses ongoing uncertainty in diagnosing certain seizure-related brain wave patterns, highlighting questions rather than answers.
View Original Abstract ↓
The ictal–interictal continuum (IIC) challenges the traditional dichotomous classification of electroencephalographic activity into ictal and interictal states and represents a major zone of diagnostic and therapeutic uncertainty in status epilepticus (SE). IIC is defined by rhythmic and periodic electroencephalographic (EEG) patterns that do not fulfill formal seizure criteria and occupies a gray zone in which the interpretation of what is ictal, treatment responsiveness, and risk of neuronal injury remains controversial. In this narrative review, we explored the boundaries between SE and the IIC, focusing on key controversies and paradoxes that emerge across electroclinical scenarios and neuroimaging findings. More specifically, we examine the time-locked electroclinical correlates and antiseizure medication responsiveness as markers of ictality, ongoing controversies in EEG-based definitions, and the role of peri-ictal neuroimaging abnormalities as complementary markers of metabolic burden. This review aims to summarize these topics and discuss key gaps for future research in the management of IIC.