Abstract
OBJECTIVE: To investigate whether Posterior Dominant Rhythm (PDR) can be reliably assessed in sleep-EEG recordings and to investigate the diagnostic yield of standard-wake and sleep-recordings.
METHODS: EEG recordings of 303 consecutive patients aged 18-88 years were analyzed. All patients had both standard-wake and sleep-recordings, including patients who had abnormal standard recordings. Melatonin was used in 6% of sleep EEGs, and sleep deprivation in 94%. The mean duration of sleep was 41 min. We measured the PDR frequency in standard and sleep-recordings, both before and after sleep. We compared the diagnostic yield of standard-wake and sleep EEG recordings.
RESULTS: Compared to standard EEG, sleep-recordings showed a significantly lower PDR frequency, both when measured before and after sleep (p < 0.001). One-hundred-fifty-six patients (51%) had normal standard recordings, and 35 of them (22%) had abnormal findings in the sleep-recording. One-hundred-forty-seven patients had abnormal standard recordings and in 16 of them (11%) these abnormalities were not present in sleep-recording.
CONCLUSIONS: PDR is significantly slower in the wake periods of sleep-recordings, compared to standard wake recordings.
SIGNIFICANCE: Sleep and standard wake recordings are complementary.
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology |
| Vol/bind | 129 |
| Udgave nummer | 4 |
| Sider (fra-til) | 713-716 |
| Antal sider | 4 |
| ISSN | 1388-2457 |
| DOI | |
| Status | Udgivet - apr. 2018 |