The current study uses retrospective analyses to identify an optimal recording duration for at-home video EEG.

Ambulatory video EEG (VEEG) allows for extended recording of EEG in the comfort of a patient’s home. However, optimal duration of recordings to capture push-button events is yet to be established.

In our pediatric sample, events were captured in 36.1% of patients by the end of Day 1. This increased to 40.6% of patients (relative increase of 12.5%) on Day 2, and 40.9% on Day 3 (relative increase of 13.3% from Day 1), representing 99.3% of all events recorded. In the adult sample, events were captured within the first day in 44.8% of patients, with an increase to 52.3% on Day 2 and 54.1% on Days 3 (relative increase from Day 1 of 16.7% and 20.8%, respectively), representing 99.76% of all events recorded by end of Day 3. In elderly patients, events were recorded in 32.9% of patients on day 1, rising to 39.9% on Day 2 (relative increase of 21.3%) and 42.9% on Day 3 (relative increase of 30.4% from Day 1), representing 99.38% of all recorded events.

These results indicate that majority of events are captured within 3 days of VEEG monitoring for all cohorts, with incremental yield ranging from 12.5%-21.3% for 2 day recordings and 13.3%-30.4% for extended 3-day recording compared to a single day of VEEG monitoring. This suggests an added benefit of extended ambulatory VEEG, with an optimal recording duration to be between 2-3 days for all cohorts.