ArticleInternational ophthalmology2020
Evaluation of microvascular changes in optic disc and retina by optical coherence tomography angiography during Valsalva maneuver.
Article in International ophthalmology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
3 citing papers in PubMed, 5 citations in OpenAlex.
- Retinal arterial macroaneurysm rupture by Valsalva maneuver: a case report and literature review.BMC ophthalmology · 2022Review
- Retinal microvasculature and vasoreactivity changes in hypertension using optical coherence tomography-angiography.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2022Observational
- Retinal Microvascular Reactivity in Chronic Cigarette Smokers and Non-smokers: An Observational Cross-Sectional Study.Frontiers in medicine · 2021Article
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3 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
purposeOptical coherence tomography angiography (OCTA) is an increasingly widespread imaging tool that allows the visualization of the microvascular structures of the eye. It should be kept in mind in clinical practice, Valsalva maneuver (VM) may have an effect on OCTA findings. We aimed to evaluate the effect of VM on the optic nerve and retinal blood flow parameters measured by OCTA.
methodsSixty age- and sex-matched healthy volunteers were included into this prospective study. Optic disc status for radial peripapillary capillary (RPC) network [whole image, inside disc and peripapillary capillary densities], superficial and deep capillary plexus whole, foveal, parafoveal and perifoveal densities and foveal avascular zone (FAZ) densities of volunteers were examined by OCTA both at rest and during VM.
resultsThe mean age of the subjects was 31.48 ± 7.49 (18-50) years and 51.7% were male. Superficial whole, parafoveal and perifoveal vessel densities were found to be significantly decreased during VM (p = 0.008, p= 0.015, p = 0.017, respectively). Lower levels of deep whole, parafoveal and perifoveal vessel densities were also detected while VM (p < 0.001 for all). However, there were no significant differences in terms of foveal vessel and FAZ densities. Additionally, VM significantly decreased RPC densities for whole image, inside and peripapillary capillary (p = 0.005, p < 0.001, p = 0.039, respectively).
conclusionVM may cause a significant decrease in optic nerve and para-perifoveal blood flow. Therefore, patient instruction about not holding breath is required before OCTA scanning.
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