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Assessment of retinal vein pulsation through video-ophthalmoscopy and simultaneous biosignals acquisition
R. Kolar, T. Vicar, J. Chmelik, R. Jakubicek, J. Odstrcilik, E. Valterova, M. Nohel, K. Skorkovska, RP. Tornow
Status neindexováno Jazyk angličtina Země Spojené státy americké
Typ dokumentu časopisecké články
NLK
Directory of Open Access Journals
od 2011
Free Medical Journals
od 2010
PubMed Central
od 2010
Europe PubMed Central
od 2010
Open Access Digital Library
od 2010-01-01
ROAD: Directory of Open Access Scholarly Resources
od 2010
PubMed
37342721
DOI
10.1364/boe.486052
Knihovny.cz E-zdroje
- Publikační typ
- časopisecké články MeSH
The phenomenon of retinal vein pulsation is still not a deeply understood topic in retinal hemodynamics. In this paper, we present a novel hardware solution for recording retinal video sequences and physiological signals using synchronized acquisition, we apply the photoplethysmographic principle for the semi-automatic processing of retinal video sequences and we analyse the timing of the vein collapse within the cardiac cycle using of an electrocardiographic signal (ECG). We measured the left eyes of healthy subjects and determined the phases of vein collapse within the cardiac cycle using a principle of photoplethysmography and a semi-automatic image processing approach. We found that the time to vein collapse (Tvc) is between 60 ms and 220 ms after the R-wave of the ECG signal, which corresponds to 6% to 28% of the cardiac cycle. We found no correlation between Tvc and the duration of the cardiac cycle and only a weak correlation between Tvc and age (0.37, p = 0.20), and Tvc and systolic blood pressure (-0.33, p = 0.25). The Tvc values are comparable to those of previously published papers and can contribute to the studies that analyze vein pulsations.
Deparment of Ophthalmology and Optometry St Ann University Hospital Brno Czech Republic
Department of Ophthalmology and Optometry Masaryk University Brno Czech Republic
Department of Ophthalmology Friedrich Alexander University Erlangen Nürnberg Erlangen Germany
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