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A family history of seizures associated with sudden cardiac deaths
Insights
Hereditary Long QT Syndrome can cause dangerous heart rhythms and neurological symptoms in children. A family history of seizures may indicate this genetic condition, prompting further cardiac evaluation.
Area of Science:
- Cardiology
- Genetics
- Neurology
Background:
- Hereditary Long QT Syndrome (LQTS) is a genetic disorder linked to potentially fatal ventricular arrhythmias.
- LQTS can manifest with symptoms mimicking neurologic conditions, complicating diagnosis in pediatric patients.
Observation:
- Two families presented with a history of sudden death after discontinuing phenytoin sodium for seizures.
- Affected children in these families were diagnosed with hereditary Long QT Syndrome.
Findings:
- A family history of seizures may be a crucial indicator of underlying hereditary Long QT Syndrome.
- Phenytoin sodium withdrawal was associated with adverse cardiac events in LQTS patients with seizure history.
Implications:
- Early identification of LQTS in children with seizure disorders or family history of seizures is critical.
- This highlights the importance of comprehensive cardiac assessment in pediatric patients with suspected or confirmed LQTS.
- Understanding the interplay between neurological symptoms and cardiac conditions like LQTS can improve patient management and outcomes.
Abstract:
Hereditary prolongation of the Q-T interval is associated with ventricular dysrhythmias. Children with hereditary prolongation of the Q-T interval may have symptoms that seem related to a neurologic abnormality. Two families had members who had been treated with phenytoin sodium for seizures and had died suddenly when the medication was discontinued. Children in both families were found to have prolongation of the Q-T interval. A history of seizures or of seizures in the family may be an indication of hereditary prolongation of the Q-T interval.