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Anoxic seizures: self-terminating syncopes
1Fraser of Allander Neurosciences Unit, Royal Hospital for Sick Children, Yorkhill, Glasgow G3 8SJ, Scotland, UK.
Summary
Anoxic seizures, often misdiagnosed as epilepsy, are typically caused by self-terminating syncopes in children. Understanding these nonepileptic events is crucial for accurate diagnosis and treatment.
Area of Science:
- Neurology
- Pediatrics
- Cardiology
Background:
- Anoxic seizures are nonepileptic events resulting from interrupted cerebral energy supply.
- They are frequently misdiagnosed as epilepsy, particularly in young individuals.
- Neurally mediated syncopes, a common cause, have varied terminology due to unclear pathophysiology.
Purpose of the Study:
- To review anoxic seizures induced by self-terminating syncopes in the young.
- To differentiate these events from epileptic seizures.
- To highlight diagnostic challenges and consequences of misdiagnosis.
Main Methods:
- Review of literature on anoxic seizures and syncopes.
- Inclusion of video clips illustrating specific types of syncope.
- Presentation of detailed case histories, including patient experiences.
Main Results:
- Anoxic seizures are common paroxysmal events misdiagnosed as epilepsy.
- Neurocardiogenic/vasovagal syncope and reflex anoxic seizures are significant causes.
- Breath-holding spells and compulsive Valsalva maneuvers in autistic individuals also induce anoxic seizures.
Conclusions:
- Anoxic seizures due to syncopes are often mistaken for epilepsy.
- Accurate diagnosis requires understanding the pathophysiology of various self-limiting syncopes.
- Misdiagnosis can lead to inappropriate treatment and negative patient outcomes.