%0 Journal Article
%T Volume ratio and distribution rate in patients with orthostatic vertigo/dizziness using MR imaging: a comparison with vertiginous diseases.
%A Inui H
%A Sakamoto T
%A Ueda K
%A Ito T
%A Kitahara T
%J Acta Otolaryngol
%V 143
%N 8
%D 2023 Aug 3
%M 37537926
%F 1.698
%R 10.1080/00016489.2023.2238760
%X <B>UNASSIGNED: </B>Orthostatic dizziness/vertigo (ODV) is characterized by lightheadedness owing to postural changes.<BR><B>UNASSIGNED: </B>To measure the endolymphatic space (ELS)/total fluid space (TFS) volume ratio and the distribution rate of endolymphatic fluid (ELF) of patients with ODV and compare them with those of control subjects (CS).<BR><B>UNASSIGNED: </B>This study included 22 patients (44 ears) with ODV and 52 controls (104 ears, CS). The ELS/TFS volume ratio (%) and distribution rate (%) of the inner ear components were measured using 3-dimensional magnetic resonance imaging.<BR><B>UNASSIGNED: </B>In the ODV group, the mean ELS/TFS volume ratios of the cochlea, vestibule, and semi-circular canals (SCCs) were 12.1%, 18.6%, and 18.1%, respectively; the mean ELS distribution rates for the cochlea, vestibule, and SCCs were 27.3%, 26.2%, and 46.6%, respectively. The ELS distribution rate of the vestibule was significantly lower (p < .01) and the ELS distribution rate of the SCCs was significantly higher in the ODV than in the CS group (p < .01).<BR><B>UNASSIGNED: </B>The ELS distribution rate in the vestibule + SCCs among patients with ODV did not differ from that in the CS; ELF in the vestibule moved to the SCCs, and a large amount of ELF was distributed only in the SCCs.