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Related Experiment Videos

Visual evoked responses in megaloblastic anemia.

A K Sood1, A Mahajan, S Sood

  • 1Department of Neurology, Pt. B. D. Sharma Postgraduate Institute of Medical Sciences, Rohtak.

Indian Journal of Physiology and Pharmacology
|January 1, 1997
PubMed
Summary

Severe megaloblastic anemia significantly prolongs pattern shift visual evoked response P100 latency. Treatment with vitamin B12 and folic acid improves visual evoked response latency, indicating a link between anemia and visual pathway function.

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Area of Science:

  • Neuroscience
  • Hematology
  • Ophthalmology

Background:

  • Megaloblastic anemia, often of nutritional origin, can lead to severe health consequences.
  • Visual pathway integrity can be affected by systemic conditions, even without overt clinical signs.
  • Pattern shift visual evoked responses (PSVER) are a sensitive tool for assessing optic nerve and visual pathway function.

Purpose of the Study:

  • To investigate the impact of severe megaloblastic anemia on pattern shift visual evoked responses (PSVER).
  • To evaluate the reversibility of visual evoked response abnormalities after anemia correction.

Main Methods:

  • Thirty patients with severe megaloblastic anemia underwent PSVER testing.
  • PSVER P100 latency and amplitude were compared to thirty age- and sex-matched controls.

Related Experiment Videos

  • Patients received vitamin B12 and folic acid treatment for three months, followed by repeat PSVER testing.

    • Main Results:

    • Patients with megaloblastic anemia exhibited significantly prolonged mean P100 latency (114.77 ms) compared to controls (96.35 ms).
    • Seventy percent of anemic patients showed prolonged P100 latency.
    • Following anemia correction, P100 latency significantly improved (mean 105.13 ms), though remained slightly prolonged compared to controls.

    Conclusions:

    • Severe megaloblastic anemia is associated with significant electrophysiological dysfunction of the visual pathway.
    • Treatment of megaloblastic anemia leads to substantial improvement in visual evoked response latency.
    • These findings highlight the importance of addressing nutritional deficiencies for maintaining visual pathway health.