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Hyperventilation-Induced High-Amplitude Rhythmic Slowing and Its Impact on Migraine Frequency in Children: A
Mahmoud Mohammadi1,2, Reza Shervin Badv2,3, Zahra Rezaei1,2
1Pediatrics Center of Excellence, Department of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.
Insights
Children with hyperventilation-induced high-amplitude rhythmic slowing (HIHARS) on EEG show increased migraine risk. A family history of migraine further elevates this susceptibility in pediatric patients.
Area of Science:
- Pediatric Neurology
- Neurophysiology
- Headache Disorders
Background:
- Migraine is the most common primary headache disorder in children.
- Hyperventilation (HV) can induce high-amplitude rhythmic slowing (HIHARS) on electroencephalogram (EEG) in some children.
- The link between HIHARS and future migraine development in children requires investigation.
Purpose of the Study:
- To evaluate the correlation between HIHARS observed during HV maneuvers and the subsequent risk of migraine onset in children.
- To identify potential predictive markers for pediatric migraine development.
Main Methods:
- The study included children aged 7-12 undergoing EEG with HV maneuvers.
- Long-term video-EEG monitoring was used to assess migraine diagnosis based on ICHD-3 criteria after six years.
- Statistical analysis was performed on clinical and neurophysiological data, including family history and seizure presence.
Main Results:
- Children exhibiting HIHARS during HV were significantly more likely to develop migraine within six years (P=0.049).
- A family history of migraine was more prevalent in children with HIHARS (68.18%) compared to those without (40%) (P=0.044).
- Seizure occurrence did not significantly influence the association between HIHARS and migraine.
Conclusions:
- This study is the first to demonstrate a correlation between HIHARS and increased migraine susceptibility in children.
- Pediatric patients aged 7-12 with HIHARS show a heightened risk for developing migraine headaches.
- Children with HIHARS and a family history of migraine are predicted to have a greater susceptibility to developing migraine later in life.
Objectives:
The most common primary headache disorder in children is migraine. Some children with hyperventilation (HV) may exhibit hyperventilation-induced high-amplitude rhythmic slowing (HIHARS) in their electroencephalogram (EEG). The study aims to evaluate the correlation between HIHARS and a child's future migraine onset risk.
Materials & Methods:
The present study evaluated HIHARS during the HV maneuver in children aged 7 to 12 admitted to the Electroencephalography Monitoring Unit for diverse referral reasons. After six years, the researchers assessed Long-term video-EEG monitoring data for migraine disease according to the International Classification of Headache Disorders, Third Edition (ICHD-3). The clinical and neurophysiological data were analyzed using appropriate statistical methods.
Results:
The study revealed that among children with HIHARS, migraine was higher (P=0.049) after six years. Additionally, 15 children (68.18%) with HIHARS had a family history of migraine, compared to 12 children (40%) without HIHARS, which was significant (P=0.044). Interestingly, no significant difference was observed between patients with seizures and those without (P=0.1), suggesting that seizures do not act as a confounding factor in this study.
Conclusion:
This is the first study on the correlation of HIHARS with migraine in children. Patients aged 7 to 12 years old with HIHARS had more susceptibility to migraine headaches. It is suggested that children with HIHARS and a history of migraine in first-degree family members will be more susceptible to developing migraine in life.
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