International Heart Journal
Online ISSN : 1349-3299
Print ISSN : 1349-2365
ISSN-L : 1349-2365
Clinical Studies
Subclinical Tonic-Clonic Epileptic Seizure Detected by an Implantable Loop Recorder
Ritsuko KohnoHaruhiko AbeNaoki AkamatsuMasahito TamuraMasaaki TakeuchiYutaka OtsujiDavid G. Benditt
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2013 Volume 54 Issue 5 Pages 289-291


A 73-year old man received an implantable loop recorder (ILR) for the evaluation of transient loss of consciousness (TLOC) spells. His medical history was without any epileptic convulsions or automatism. ILR recording during a spontaneous episode revealed the presence of a regular, narrow QRS complex tachycardia associated with low-amplitude, high-frequency, continuous or discontinuous artifacts, consistent with myopotentials. During the event, the regular, lowamplitude continuous signals gradually became discontinuous, with a prolongation of the inter-signal cycle length, until their disappearance after manual activation of the ILR. The patient was diagnosed as experiencing subclinical tonic-clonic epileptic seizures. Antiepileptic drug treatment was initiated, and the patient has remained free of TLOC symptoms during 13 months follow-up.

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© 2013 by the International Heart Journal Association
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