Objectives: We evaluated the utility of transcranial Doppler
ultrasonography in determining the vascular pathology in
patients with sudden hearing loss.
Patients and Methods: The study included 13 patients (11
males, 2 females; mean age 46.6±17.7 years; range 18 to
66 years) with a diagnosis of sudden hearing loss. Patients
having chronic otitis media or other middle ear diseases or a
history of surgery in the affected ear were excluded. All the
patients were evaluated by pure-tone audiometry, impedance
audiometry, transient evoked otoacoustic emissions,
auditory brainstem responses, and transcranial Doppler
ultrasonography. The results were compared with those of a
control group of 19 age- and sex-matched healthy subjects
(12 males, 7 females; mean age 46.8±6.9 years; range 33 to
58 years) who did not have any ear disease or a history of
ototoxic drug intake or working in a noisy environment, and
no pathology on otoscopic and audiometric examinations.
Results: Compared to the normal ear, the mean blood flow
and systolic flow velocities of the vertebral artery were significantly
decreased, and the mean pulsatile index was significantly
increased on the affected side. The mean flow
velocity of the basilar artery in the patient group was lower
than that found in the control group.
Conclusion: Transcranial Doppler ultrasonography can be
used for the evaluation of vascular involvement of the vertebral
and basilar arteries in patients with sudden sensorineural
FREE FULL TEXTAnahtar Kelimeler: Baziler arter; ani işitme kaybı; ultrasonografi,Doppler, transkraniyal; vertebral arter.