There is a correlation between TGA and migraine. diagnosis may be made safely in the presence of a characteristic collateral history.remote precipitating events, with onset reported weeks prior to TGA, are considered anxiety triggered by conflict at home or work, health problems, and financial stressors (3).close precipitating events for TGA are considered emotional stress (i.e., triggered by gastric endoscopy, birth/death announcement, and difficult/exhausting workday), physical effort (i.e., gardening, house work, and sawing wood), physical exertion (including sexual activity), and water contact/temperature change (i.e., hot bath/shower and cold swim) (3).possible that it may result from different mechanisms such as venous congestion with valsalva-like activities before symptom onset, arterial thromboembolic ischaemia and vasoconstriction due to hyperventilation (1).Precipitating factors include sexual intercourse and heavy physical exercise, particularly swimming in cold water. study evidence showed a recurrence rate of 6.3% in a 10 year period.studies show a slight female predominance.Across studies, the mean age of an episode ranges from 61 to 67.3 years most commonly presents in the seventh decade of life.attacks usually last for 1-8 h but should be less than 24 h (1)Įpidemiological data put the annual incidence of TGA between 3.4 and 10.4/100,000 (2).patient remain alert, attentive, and cognition is not impaired.does not have any focal neurological symptoms.presents classically with an abrupt onset of severe anterograde amnesia.is unable to recall the episode once they have recovered.Is neurologically intact except for absent memory Patients with this condition are often described - wrongly - as being confused. The patient is usually over 50 years old and an attack may last several hours. Transient global amnesia (TGA) is a temporary and isolated disorder of memory. Last edited 08/2020 and last reviewed 08/2020
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