Flash Visual Evoked Potential Recording in Patients with Brain Stroke.

Author(s): Seyedehsaba Ameli, Ali Panahi sharif, Sanaz saleh, seyed Mohammad Masoud Shushtarian, Ahmad Shojaei.

Aim: Stroke, also known as a brain attack, occurs when blood supply to part of the brain is blocked or when a blood vessel in the brain bursts, resulting in damage or death of brain tissue. The visual system, particularly visual pathway may be affected during this episode. The aims is to investigate the visual pathway of stroke patients using flash visual evoked potential.

Material and Methods: Thirteen patients with a brain attack (6 male and 7 female) in the age range of 55 to 70, who were referred to Basir clinic for visual evoked potential recordings, were included in this study. Flash visual evoked potential were used due to the impaired visual acuity in stroke patients. The results were compared with those of a healthy group consisting of 13 individuals matched in terms of age and sex. Statistical analysis was performed using SPSS version 22.

Results: There were not significant differences between the case and control groups in terms of demographical findings such as age and sex. However, there was a significant difference in the best-corrected visual acuity (BCVA) between the two groups (p < 0.05). The mean latency of the visual evoked potential (VEP) P100 wave was significantly different between the patient and the healthy group (116.26 ± 5.45 and 104.3 ± 3.28, respectively). Additionally, the amplitude of the VEP P100 peak differed significantly between the case and control groups (1.8±0.49 and 5.07±1.89, respectively).

Conclusion: Stroke can cause damage to the visual pathway, which can be assessed using VEP parameters, specifically the P100 peak.

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