FREQUENCY DOMAIN ELECTRORETINOGRAPHY IN RETINITIS PIGMENTOSA VERSUS NORMAL EYES

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HASSAN KARIMI HOMA; JAFARZADEHPUR EBRAHIM; BLOURI BAHRAM; HASHEMI HASSAN; ZARE SADEGHI ARASH; MIRZAJANI ALI

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Journal Paper

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Journal: Journal of Ophthalmic and Vision Research Year:2012 | Volume:7 | Issue:1 Page(s): 34-38

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Title

FREQUENCY DOMAIN ELECTRORETINOGRAPHY IN RETINITIS PIGMENTOSA VERSUS NORMAL EYES

Author(s)

Keywords

ELECTRORETINOGRAM (ERG)

RETINITIS PIGMENTOSA (RP)

FAST FOURIER TRANSFORM (FFT)

FMOD

Abstract

Purpose: To compare electroretinogram (ERG) characteristics in patients with retinitis pigmentosa (RP) and normal subjects using frequency domain analysis.Methods: Five basic ERG recordings were performed in normal subjects and patients with a clinical diagnosis of RP according to the ISCEV (International Society of Clinical Electrophysiology of Vision) protocol. Frequency domain analysis was performed by MATLAB software. Different frequency domain parameters were compared between the study groups.Results: Peak frequency (Fmod) of flicker and oscillatory responses in RP patients showed significant (P<0.0001) high pass response as compared to normal controls.Peak frequency (Fmod) of the other responses was not significantly different between the two groups.Conclusion: In addition to conventional ERG using time domain methods, frequency domain analysis may be useful for diagnosis of RP. Oscillatory and flicker responses may be analyzed in frequency domain. Fast Fourier transform may reveal two distinct high pass responses (shift to higher frequencies) in FMOD. Time and frequency domain analyses may be performed simultaneously with many modern ERG machines and may therefore be recommended in RP patients.

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APA: Copy

HASSAN KARIMI, HOMA, JAFARZADEHPUR, EBRAHIM, BLOURI, BAHRAM, HASHEMI, HASSAN, ZARE SADEGHI, ARASH, & MIRZAJANI, ALI. (2012). FREQUENCY DOMAIN ELECTRORETINOGRAPHY IN RETINITIS PIGMENTOSA VERSUS NORMAL EYES. JOURNAL OF OPHTHALMIC AND VISION RESEARCH, 7(1), 34-38. SID. https://sid.ir/paper/311499/en

Vancouver: Copy

HASSAN KARIMI HOMA, JAFARZADEHPUR EBRAHIM, BLOURI BAHRAM, HASHEMI HASSAN, ZARE SADEGHI ARASH, MIRZAJANI ALI. FREQUENCY DOMAIN ELECTRORETINOGRAPHY IN RETINITIS PIGMENTOSA VERSUS NORMAL EYES. JOURNAL OF OPHTHALMIC AND VISION RESEARCH[Internet]. 2012;7(1):34-38. Available from: https://sid.ir/paper/311499/en

IEEE: Copy

HOMA HASSAN KARIMI, EBRAHIM JAFARZADEHPUR, BAHRAM BLOURI, HASSAN HASHEMI, ARASH ZARE SADEGHI, and ALI MIRZAJANI, “FREQUENCY DOMAIN ELECTRORETINOGRAPHY IN RETINITIS PIGMENTOSA VERSUS NORMAL EYES,” JOURNAL OF OPHTHALMIC AND VISION RESEARCH, vol. 7, no. 1, pp. 34–38, 2012, [Online]. Available: https://sid.ir/paper/311499/en

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