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Visual migrainous symptoms were reported by 1.23%(26/2110)of subjects(1. 33%of women and 1.08%of men).In 65%of subjects the episodes were stereotyped and they began after age 50 years in 77%.Mean age at onset of the episodes was 56.2 plus or minus 18.7 years.In 58%of the subjects,the episodes were never accompanied by headaches and 42%had no headache history.The number of episodes ranged from 1 to 500 and was 10 or more in 69%of subjects.The episodes lasted from 15 to 60 minutes in 50%of subjects.Sixty-five percent of the subjects were examined by a study neurologist and only 19%of them met the criteria of the International Headache Society.Twelve percent of subjects sustained a stroke after the onset of migrainous visual symptoms:a subarachnoid hemorrhage 1 year later,an atherothrombic brain stem infarct 3 years later and a cardioembolic stroke 27 years later.In contrast,of 87 subjects with TIAs in the same cohort,33%developed a stroke,two-thirds within 6 months of TIA onset.Late life onset transient visual phenomena similar to the visual aura of migraine are not rare and often occur in the absence of headache. These symptoms appear not to be associated with an increased risk of stroke and invasive diagnostic procedures or therapeutic measures are generally not indicated. |
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cerebrovascular accident
cerebrovascular disease,risk factors in
lipoproteins
migraine,equivalents
migraine,late life
migraine,visual symptoms in
migraine,without headache
old age,neurology of
ophthalmic migraine
risk factors
vision,kaleidoscopic
visual loss,transient
visual symptoms
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