Evaluation of microvascular changes in optic disc and retina by optical coherence tomography angiography during Valsalva maneuver

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dc.contributor.authorOzcan, Sait Coskun
dc.contributor.authorKurtul, Bengi Ece
dc.contributor.authorOzcan, Deniz Ozarslan
dc.date.accessioned2024-09-18T21:00:32Z
dc.date.available2024-09-18T21:00:32Z
dc.date.issued2020
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractPurpose Optical 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. Methods Sixty 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. Results The 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). Conclusion VM 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.en_US
dc.identifier.doi10.1007/s10792-020-01461-x
dc.identifier.endpage2749en_US
dc.identifier.issn0165-5701
dc.identifier.issn1573-2630
dc.identifier.issue10en_US
dc.identifier.pmid32533453en_US
dc.identifier.scopus2-s2.0-85086477075en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage2743en_US
dc.identifier.urihttps://doi.org/10.1007/s10792-020-01461-x
dc.identifier.urihttps://hdl.handle.net/20.500.12483/12743
dc.identifier.volume40en_US
dc.identifier.wosWOS:000539920900002en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofInternational Ophthalmologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectValsalva maneuveren_US
dc.subjectOptical coherence tomography angiographyen_US
dc.subjectRetinaen_US
dc.subjectOptic discen_US
dc.subjectMicrovasculatureen_US
dc.titleEvaluation of microvascular changes in optic disc and retina by optical coherence tomography angiography during Valsalva maneuveren_US
dc.typeArticleen_US

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