الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Many viruses, including herpes zoster oticus, CMV, rubella, measles, and mumps, can impact the vestibular system; hence, these viruses are thought to be potential causes of dizziness and balance problems. Additionally, dizziness has been experienced by COVID-19 patients as common symptom during the infection or in the recovery period.(5, 87, 88)
Our study was carried out on 60 subjects, who we divided into two groups: 30 post COVID patients (two weeks to 11 months after recovery from COVID-19) and 30 controls. We were aiming to study the long term effects of COVID-19 infection on the vestibular system function in post- COVID patients. This was accomplished through testing our study subjects using VNG, and comparing their results to a control group.
During the pandemic, many case reports were released describing COVID-19-induced vestibular neuritis. However, none of these patients had a peripheral vestibular assessment, leaving the diagnosis of vestibular neuritis unclear.(79, 89, 90) Consequently, Vertigo’s peripheral cause must be confirmed in order to rule out a central pathology for which other investigations as brain MRI (magnetic resonance imaging) may occasionally be normal.(80)
Onset of dizziness:
In the study group, twelve cases (40%) developed dizziness in the first three months after the infection; five cases (16.6%) presented to our clinic just after the infection has resolved (14 days of isolation), seven cases (23.3%) few weeks up to three months after the infection and eleven cases(36.6%) presented to our clinic three to six months after the infection and the remaining seven patients (23.3%) within six to eleven months after the COVID-19 infection, there were sixteen patients (53.3%) that were still complaining of dizziness at the time they presented to our clinic and the fourteen cases (46.6%) were already resolved.
COVID-19 patients who have recovered but still exhibit manifestations or who have symptoms that last longer than usual have been identified to have post-acute COVID-19 syndrome, also known as (long COVID).(91) Persistent symptoms and/or long-term sequelae that may be delayed of SARS-CoV-2 infection beyond 4 weeks after the onset of symptoms are referred to by some authors as post-acute COVID-19.(92) Based on current studies, it is further divided into two categories: (1) subacute or ongoing symptomatic COVID-19, which comprises symptoms that present from 4–12 weeks beyond acute infection; and (2) chronic or post-COVID-19 syndrome, which includes symptoms and abnormalities persisting beyond 12 weeks of the onset of the