1/5. Cases from the aerospace medicine Residents' teaching File: acute onset of dizziness in a USAF aviator.An air Force F-15 pilot develops the sudden onset of incapacitating dizziness with nausea and vomiting not associated with flight. Presentation, diagnosis, treatment, and aeromedical issues surrounding the symptom complex of acute onset vertigo is discussed.- - - - - - - - - - ranking = 1keywords = vertigo (Clic here for more details about this article) |
2/5. Delayed endolymphatic hydrops and its relationship to Meniere's disease.Delayed endolymphatic hydrops (EH) can be characterized as having ipsilateral and contralateral types. They are similar in that both have early and late phases of otologic symptoms and that the early phase is a profound hearing loss in one ear. The late phases differ, however, in that the ipsilateral type develops the symptoms of EH (episodic vertigo) in the deaf ear and the contralateral type develops the symptoms of EH (fluctuating hearing loss and/or episodic vertigo) in the hearing ear. In more than half the cases of both types of delayed EH, the profound hearing losses in the early phase are simply discovered to be present in early childhood without a known time of onset. The temporal bones of two patients with contralateral delayed EH show pathologic changes in the deaf ears that are similar to those known to occur in mumps and measles labyrinthitis, whereas the pathologic changes in the hearing ears are similar to those known to occur in Meniere's disease. These observations support the proposition that Meniere's disease may occur as a delayed sequela of inner ear damage sustained during an attack of subclinical viral labyrinthitis occurring in childhood.- - - - - - - - - - ranking = 2keywords = vertigo (Clic here for more details about this article) |
3/5. Sudden vertigo of central origin.Intense vertiginous attacks with sudden onset and of several months' duration were observed in a group of patients following viral infection. Neurotological examination revealed different types of signs of involvement of the central vestibular apparatus. All of these patients became dizzier when medicated with vestibular depressor drugs, and could obtain symptomatic relief with corticosteroids. They became asymptomatic after a period of 3-4 months from the onset of the disease, but the signs of central vestibular involvement persisted for 6-12 months.- - - - - - - - - - ranking = 4keywords = vertigo (Clic here for more details about this article) |
4/5. Idiopathic sudden hearing loss.Idiopathic sudden hearing loss is an otologic emergency with an obscure cause. It is the acute onset of hearing loss of 30 cB in three contiguous frequencies, which may occur instantaneously or progressively over several days. Suspect etiologies include viral infections, cochlear artery occlusion, rupture of the intracochlear membranes, and biochemical alterations in the metabolism maintaining the endocochlear membrane potentials. Histopathology of the temporal bone most commonly reveals atrophy of the organ of corti and striae vascularis. Treatments proposed include close observation for spontaneous recovery, steroid theray, and combination regimens of vasodilators, steroids, diuretics, and intravenous iodinated radiocontrast material. prognosis and recovery are related to the audiometric pattern of the hearing loss and associated symptoms. The absence of vertigo at th clinical onset and low tone hearing loss are associated with better hearing recovery.- - - - - - - - - - ranking = 1keywords = vertigo (Clic here for more details about this article) |
5/5. Dizzy patients: the varieties of vertigo.Some vertigo results from acute viral labyrinthitis or a cerebrovascular event; many cases are due to loose particulate matter within the semicircular canals. In the vast majority of patients, a careful history and appropriate clinical tests will suffice to identify the cause of the vertigo--and with benign paroxysmal positional vertigo, a simple clinical maneuver can also provide a cure.- - - - - - - - - - ranking = 7keywords = vertigo (Clic here for more details about this article) |