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[Amnesic stroke caused by hippocampal infarction].

C Pérez-Lázaro1, S Santos, M Garcés-Redondo

  • 1Servicio de Neurología, Hospital Clínico Universitario Lozano Blesa, San Juan Bosco 15, E-50009 Zaragoza, Spain. nrlh-ictus@hcu-lblesa.es

Revista De Neurologia
|July 7, 2005
PubMed
Summary

Amnesic stroke, a rare vascular condition, can cause persistent memory loss. This case highlights hippocampal stroke impacting short-term memory with good recovery, differentiating it from vascular dementia.

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Area of Science:

  • Neurology
  • Neuroscience
  • Vascular Neurology

Background:

  • Amnesic stroke is a rare vascular condition characterized by persistent acute amnesia.
  • It is associated with lesions in the posterior cerebral artery (PCA), thalamic, and anterior choroidal arteries.
  • Clinical reports on amnesic stroke are scarce, necessitating further case studies.

Observation:

  • A 77-year-old male with vascular risk factors presented with sudden onset mnemonic deficit and apathy.
  • Neuropsychological evaluation revealed global amnesia, affecting short-term memory and information retention, with preserved long-term memory.
  • Brain imaging showed a right sylvian infarction and bilateral hippocampal hypodense areas.

Findings:

  • The patient experienced anterograde episodic amnesia, impacting daily activities.

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  • Short-term memory and information retention were significantly impaired.
  • Recovery was noted, with improvement in short-term memory and concept retention.

    • Implications:

    • This case illustrates a specific amnesic stroke syndrome linked to hippocampal involvement.
    • The distinct pattern of memory impairment and recovery differentiates it from vascular dementia.
    • Understanding these syndromes aids in diagnosis and prognosis of memory deficits following stroke.