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Electrophysiological findings in extensive macular atrophy with pseudodrusen
Sung Eun Song Watanabe1, Andressa Zanini Fantato Quercia2, Paula Yuri Sacai2
1G6 Electrophysiology Laboratory, Rua Doutor Diogo de Faria, 1202, São Paulo, Brazil. sungwatanabe@yahoo.com.br.
Purpose:
To present electroretinogram findings in extensive macular atrophy with pseudodrusen (EMAP) and describe associated systemic factors.
Design:
Retrospective case series.
Methods:
Data on medical history, visual symptoms, multimodal imaging findings, and visual field were collected from the medical records of patients with extensive macular atrophy with pseudodrusen who attended a visual electrophysiology laboratory. Electrophysiological tests, including full-field electroretinogram, multifocal electroretinogram and photopic negative response, were performed.
Results:
Eighteen patients (10 [56%] females, age 49-66 years) were included. Of these, 17 (94%) had a history of rheumatic fever in childhood and/or adolescence, 7 (39%) had cardiovascular disease, 4 (22%) had autoimmune disease, and 10 (56%) had inflammatory conditions. The primary visual complaints were nyctalopia (95%), followed by visual field loss (67%) and dyschromatopsia (67%). The key retinal findings included retinal pigmented epithelium atrophy in the macular region and subretinal drusenoid deposits. Regarding electrophysiological results, 100% of patients had abnormalities on multifocal electroretinogram, 94% displayed alterations in photopic negative response, and 78% showed changes in the full-field electroretinogram.
Conclusions:
In this cohort, electrophysiologic evaluation demonstrated diffuse retinal dysfunction affecting all layers of the retina in patients with EMAP. The disease is associated with immune-mediated systemic conditions, chiefly rheumatic fever.
