Transient global amnesia
Defination
The recall of recent events simply vanishes
Causes
Mild head trauma
Sudden immersion in cold /hot water
Exposure to high altitude
Medical procedures e.g angiography
Acute emotional distress e.g from bad news
Strenuous physical activities
Diagnostic tests
Syncope
Cardioembolic sroke
Temporal lobe epilepsy
Basilar artery thrombosis
Posterior cerebral artery
Complex partial seizures
Migraine variants
References
Pantoni L. Transient global amnesia :an intriguing yet being disturbance. Arq Neuropsiquiats. 2009. Jan, 77 (1) :1-
Zhang Z, Liu Z, peng D. Transient global, temporal amnesia secondary to atherosclerotic stenosis of accessory posterior cerebral artery. J stroke cerebrovasc Dis 2019 Apr ;28 (4) : e22-e23
Pathophysiology
Small white matter changes
Basal ganglia lesions/peri ventricular lucencies in 12%
Early memory in hippocampus is transfered to remote memories
Atherosclerotic events disrupt bloodflow to hippocampus
Venous congestion & jugular vein valve insufficient are also hypothesized
Severe emotional reaction & migraine contribute to destabilization of CA1
Risk factors
Cardiovascular patients
Carotid atheromasia
Cancer patients
Ischemic heart disease
Clinical manifestation
Headaches
Dizziness
Chills
Hot flushes
Fear of dying
Parasthesis
Risk factors
Age
History of migraine
Nursing intervention
Note any accompanying signs and symptoms
Administer medication as doctor's prescription for symptoms
Brain and imaging test - CT, MRI, EEG