Article Text

Download PDFPDF
TP3-6 Preliminary evaluation of diagnostic home video telemetry (HVT)
  1. W Stern,
  2. G Leschziner,
  3. R Howard,
  4. M Koutroumanidis
  1. GSTT, London, UK


Objectives To assess the clinical usefulness of HVT over the first 2 years.

Design Cohort observational.

Subjects 60 patients (49 F) with epilepsies or non-epileptic paroxysmal clinical events.

Methods 48–72 hour continuous video EEG at patients’ own environment.

Results HVT answered the primary clinical question in 45/60 patients (75%), and provided additional clinical information in 5 patients [2 with unsuspected coexistent psychogenic non-epileptic seizures (PNES) and 3 with unsuspected sleep disorders (SD)]. Of the 12 patients with Idiopathic Generalized Epilepsy, absences had been overestimated in 6 and underestimated in 4, while absence status was recorded in 1 of the 2 patients in whom it had been suspected. Valproate was possible to drastically reduce or stop in 3/6 women. Focal seizures were recorded in 19 of 28 patients with focal epilepsies, PNES were the habitual seizures in further 2 patients, while syndrome classification changed in one. In all 4 patients referred for differentiation between SD and epilepsy, HVT confirmed parasomnias in 2, daytime naps in 1 and idiopathic hypersomnia in 1. The diagnosis of PNES was confirmed in 8 of 13 suspected patients. HVT was unhelpful in the 3 patients referred for not witnessed, poorly understood episodes of loss of consciousness. Three patients switched off the video and 2 failed to change battery on day 2.

Conclusions HVT is a useful diagnostic test provided that diagnostic hypothesis and clinical question are appropriate.

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.