E-ISSN 2231-3206 | ISSN 2320-4672
 

Original Research 


Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study

Sangeeta Gupta, Punita Garg, Gaurav Gupta.

Abstract
Background: The clinical applicability of visual evoked potential (VEP) tests has been progressively extending in neuro-ophthalmological workups. The role in monitoring and follow-ups are emerging as even more useful applications.

Aims and Objectives: The present study aimed to assess the clinical role of pattern-reversal VEP (PRVEPs) in visual disorders with presumptive optic nerve involvement.

Materials and Methods: PRVEP records of 58 patients with unilateral/bilateral visual loss in a study period of 1˝ year were retrospectively analyzed. P100 latencies and N75-P100 amplitudes were compared with those of 60 age and sex-matched controls. Variations beyond three standard deviations were applied to define significant abnormalities. PRVEP records obtained by follow-up in some conditions were also assessed.

Results: Traumatic optic neuropathy (32.76%) was the most common condition confronted, with major PRVEP finding as absent waveforms/reduced amplitudes. Monitoring of VEP records revealed improvement in 50% of patients on corticosteroid therapy. Functional visual disorders constituted 27.6% with 93.75% of subjects confirmed by PRVEP. Ethambutol-induced toxic optic neuropathy (20.69%) was associated with significant P100 delay bilaterally, in the majority. Out of which, 50% showed improved PRVEP records after 1 month of cessation of drug. Multiple sclerosis and optic neuritis though rarer conditions (3.44% and 6.89%, respectively) exhibited characteristic electrophysiological findings which helped confirming the diagnosis. Diabetic optic neuropathy (3.4%) and some very rare conditions also constituted the referrals.

Conclusion: VEPs provides sensitive adjuncts to diagnosis in various visual disorders and contributes as important monitoring tools for objectively assessing the recovery and ophthalmological status.

Key words: Electrophysiological; Monitoring; Optic Neuropathy; P100; Visual Evoked Potentials


 
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Pubmed Style

Gupta S, Garg P, Gupta G. Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study. Natl J Physiol Pharm Pharmacol. 2018; 8(7): 1046-1052. doi:10.5455/njppp.2018.8.0309519032018


Web Style

Gupta S, Garg P, Gupta G. Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study. http://www.njppp.com/?mno=293530 [Access: September 19, 2018]. doi:10.5455/njppp.2018.8.0309519032018


AMA (American Medical Association) Style

Gupta S, Garg P, Gupta G. Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study. Natl J Physiol Pharm Pharmacol. 2018; 8(7): 1046-1052. doi:10.5455/njppp.2018.8.0309519032018



Vancouver/ICMJE Style

Gupta S, Garg P, Gupta G. Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study. Natl J Physiol Pharm Pharmacol. (2018), [cited September 19, 2018]; 8(7): 1046-1052. doi:10.5455/njppp.2018.8.0309519032018



Harvard Style

Gupta, S., Garg, P. & Gupta, G. (2018) Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study. Natl J Physiol Pharm Pharmacol, 8 (7), 1046-1052. doi:10.5455/njppp.2018.8.0309519032018



Turabian Style

Gupta, Sangeeta, Punita Garg, and Gaurav Gupta. 2018. Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study. National Journal of Physiology, Pharmacy and Pharmacology, 8 (7), 1046-1052. doi:10.5455/njppp.2018.8.0309519032018



Chicago Style

Gupta, Sangeeta, Punita Garg, and Gaurav Gupta. "Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study." National Journal of Physiology, Pharmacy and Pharmacology 8 (2018), 1046-1052. doi:10.5455/njppp.2018.8.0309519032018



MLA (The Modern Language Association) Style

Gupta, Sangeeta, Punita Garg, and Gaurav Gupta. "Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study." National Journal of Physiology, Pharmacy and Pharmacology 8.7 (2018), 1046-1052. Print. doi:10.5455/njppp.2018.8.0309519032018



APA (American Psychological Association) Style

Gupta, S., Garg, P. & Gupta, G. (2018) Evaluating the clinical applications of visual evoked potentials in patients presenting with visual dysfunctions - A retrospective study. National Journal of Physiology, Pharmacy and Pharmacology, 8 (7), 1046-1052. doi:10.5455/njppp.2018.8.0309519032018





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