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Long QT syndrome presenting as a seizure
L L Herman1, M Stoshak, T J Rittenberry
1Department of Emergency Medicine, University of Illinois College of Medicine, Chicago.
The American Journal of Emergency Medicine
|September 1, 1992
Summary
Long QT syndrome can cause new-onset seizures in young adults. Early diagnosis and treatment with beta blockers and pacemakers can prevent dangerous arrhythmias and seizures.
Area of Science:
- Cardiology
- Neurology
- Genetics
Background:
- New-onset seizures in young adults can have various underlying causes.
- Electrocardiographic abnormalities, such as a prolonged QT interval, may be overlooked in initial evaluations.
Observation:
- A 21-year-old woman presented with confusion and was found to have a prolonged QT interval and ventricular tachycardia preceding seizure activity.
- A precordial thump successfully terminated both the ventricular tachycardia and seizure.
- Electrophysiologic studies confirmed Long QT syndrome.
Findings:
- Long QT syndrome is a potentially life-threatening condition characterized by delayed ventricular repolarization.
- This case highlights the association between Long QT syndrome and new-onset seizures.
- Successful management involved beta-blockade and pacemaker insertion.
Implications:
- Long QT syndrome should be considered in the differential diagnosis of unexplained seizures, particularly in younger populations.
- Prompt recognition and appropriate management can prevent recurrent cardiac arrhythmias and neurological events.
- This case underscores the importance of comprehensive cardiac evaluation in patients with new-onset seizures.