Transient global amneisa diagnostic criteria

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Overview of Diagnostic Criteria of Transient Global Amnesia

Transient global amnesia is a sudden, temporary disturbance of memory in which the patient cannot retain new information and has a period of retrograde amnesia, while remaining alert, oriented to person, and otherwise neurologically normal. Diagnostic criteria focus on a witnessed, isolated episode of amnesia that resolves within 24 hours, without seizures, head trauma, or other major neurologic deficits.[1][2][3]

Diagnostic Criteria

  • Attack is witnessed
    • The episode is seen by someone who can describe how it began and evolved[2][3].
  • Clear anterograde amnesia
    • The patient cannot lay down new memories.
    • Often asks repetitive, stereotyped questions (e.g., “Where am I?”, “What happened?”)[1][2][3].
  • Disturbance limited to memory
    • Dysfunction is confined to repetitive queries and amnesia[2][3].
    • No clouding of consciousness[2][3].
    • No general cognitive defect aside from memory disturbance on bedside testing[1].
    • No loss of personal identity (the patient knows who they are and recognizes familiar people, except for events within the retrograde gap)[2][3].
  • No other major neurologic signs
    • No focal neurologic signs during or after the attack[2][3].
    • No major neurologic symptoms suggesting stroke or other focal brain disease[1][2].
  • No seizure or recent head trauma
  • Transient course
    • Memory loss is transient, typically lasting several hours[4].
    • The episode resolves within 24 hours[1][2][3].
    • A permanent gap in memory remains for the episode itself and for a period before onset[1].

Table

Source Diagnostic Features
Adapted from Caplan[5] Attack is witnessed
Dysfunction limited to repetitive queries and amnesia
No other major neurologic signs or symptoms
Memory loss is transient, usually lasting hours to a day
Adapted from Hodges & Warlow[6] Attack is witnessed
Clear anterograde amnesia
No clouding of consciousness, cognitive defect, or loss of personal identity
Attack resolves within 24 hours
No focal neurologic signs during or after the attack
No epileptic features
No recent head injury or active epilepsy

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 BENDER MB (March 1960). "Single episode of confusion with amnesia". Bull N Y Acad Med. 36 (3): 197–207. PMC 1806291. PMID 13798787.
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 Mangla A, Navi BB, Layton K, Kamel H (February 2014). "Transient global amnesia and the risk of ischemic stroke". Stroke. 45 (2): 389–93. doi:10.1161/STROKEAHA.113.003916. PMC 3946840. PMID 24309586.
  3. 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 Lee SH, Kim KY, Lee JW, Park SJ, Jung JM (April 2022). "Risk of ischaemic stroke in patients with transient global amnesia: a propensity-matched cohort study". Stroke Vasc Neurol. 7 (2): 101–107. doi:10.1136/svn-2021-001006. PMC 9067272 Check |pmc= value (help). PMID 34702748 Check |pmid= value (help).
  4. Baker J, Savage S, Milton F, Butler C, Kapur N, Hodges J, Zeman A (2021). "The syndrome of transient epileptic amnesia: a combined series of 115 cases and literature review". Brain Commun. 3 (2): fcab038. doi:10.1093/braincomms/fcab038. PMC 8047097 Check |pmc= value (help). PMID 33884371 Check |pmid= value (help).
  5. Caplan LR (October 2022). "Transient global amnesia. What's in a name?". J Neurol Sci. 441: 120348. doi:10.1016/j.jns.2022.120348. PMID 35940029 Check |pmid= value (help).
  6. Hodges JR, Warlow CP (October 1990). "Syndromes of transient amnesia: towards a classification. A study of 153 cases". J Neurol Neurosurg Psychiatry. 53 (10): 834–43. doi:10.1136/jnnp.53.10.834. PMC 488242. PMID 2266362.