Correlation between electronystagmographic findings and results of transcranial Doppler ultrasonography of vertebrobasilar arterial system in patients with vertigo
Chudzik, W.; Olszewski, J.; Kochanowski, J.; Chmielewski, H.; Kaczorowska, B.; Guzowska-Bartnik, E.
Neurologia i Neurochirurgia Polska 32(5): 1061-1068
1998
ISSN/ISBN: 0028-3843 PMID: 10463221 Document Number: 495968
The purpose of the study was the determination of correlations between the results of electronystagmographic (ENG) investigations and the blood flow velocity in the vertebrobasilar arterial system measured by Doppler ultrasonography in patients with vertigo. The studied material comprised 68 patients (39 women and 29 men) aged 34-68 years (mean 52.4 years). ENG findings included unilateral hyporeflexia in 25 cases (37.7%), bilateral hyporeflexia in 15 (22.0%) and unilateral canal failure in 8 (11.9%). Doppler USG with neck rotation test showed normal flow velocity in 15 cases (22.0%) and pathological velocity in the remaining 53 cases (78.0%). These results showed that bilateral hyporeflexia is found usually in bilateral failure of vertebral arteries and unilateral hyporeflexia and unilateral canal failure were found with unilateral vertebral artery failure on the same side.