Short QTc in epilepsy patients without cardiac symptoms

Hiok Seng Teh, Hui Jan Tan, C. Y. Loo, Raymond Azman Ali

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Epilepsy patients have a higher mortality rate than the general population. Sudden unexpected death in epilepsy (SUDEP) is a major cause of mortality for these patients. The possibility of cardiac involvement in the pathogenesis of SUDEP has been suggested by many previous studies. This study compared the QT interval in epilepsy patients and normal controls, and identified the factors that affected the QT interval. Standard 12-lead ECGs were recorded from 70 consecutive epilepsy patients from the neurology clinic of HUKM and 70 age, race and gender matched controls. The mean QT interval corrected for heart rate (QTc) was calculated and compared. The mean QTc among the epilepsy patients was 0.401 ± 0.027s. It was significantly shorter than the QTc (0.420 ± 0.027s) in the control group (p<0.0005). Thirty five epilepsy patients (50%) and 17 matched controls (24.3%) had a mean QTc shorter than 0.40s (p=0.001). Among the epilepsy patients, the mean QTc did not significantly differ between patients in the duration (F=0.836, p=0.438) of the epilepsy, frequency (F=0.273, p=0.845) and types of seizures (p=0.633). There was no significant difference in the mean QTc between the epilepsy patients on different number of antiepileptic agents (F=0.444, p=0.643). Patients with cryptogenic epilepsy had a mean QTc of 0.392 ± 0.029s, which was significantly shorter than patients with symptomatic epilepsy (QTc = 0.410 ± 0.027s, p = 0.015). The mean QTc of the same subjects showed no significant interobserver difference (p=0.661). This study, for the first time, demonstrates that epilepsy patients have a significantly shorter QTc than controls, particularly in the subgroup of patients with cryptogenic epilepsy.

Original languageEnglish
Pages (from-to)104-108
Number of pages5
JournalMedical Journal of Malaysia
Volume62
Issue number2
Publication statusPublished - Jun 2007

Fingerprint

Epilepsy
Sudden Death
Mortality
Neurology
Anticonvulsants
Electrocardiography
Seizures
Heart Rate
Control Groups

Keywords

  • Cryptogenic
  • Epilepsy
  • QT interval
  • Shortened
  • SUDEP

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Short QTc in epilepsy patients without cardiac symptoms. / Teh, Hiok Seng; Tan, Hui Jan; Loo, C. Y.; Ali, Raymond Azman.

In: Medical Journal of Malaysia, Vol. 62, No. 2, 06.2007, p. 104-108.

Research output: Contribution to journalArticle

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