Abstract
Purpose: To determine how choroidal venous congestion alters the indocyanine green angiograms (ICGA) of monkeys. Methods: Two vortex veins in each eye of 5 Japanese macaque monkeys were sutured and cauterized at their exit. ICGA and fluorescein angiography (FA) were performed immediately after the occlusions. The FA and ICGA findings were correlated with the histopathological changes. Results: ICGA showed a delay in filling the choroidal arteries in the field of the occluded vortex veins, and the choroidal veins were filled retrogradely in a pulsatile manner. The fluorescence intensity of the larger veins was higher in the occluded area. The clearance of the indocyanine green dye was delayed by approximately 15 min. Histology showed that the choroidal veins in the occluded field were engorged with red blood cells. Conclusion: The ICGA findings in eyes with choroidal venous congestion are a delay in the filling of the choroidal arteries, reflux of venous blood flow, increase in fluorescence intensity of the choroidal veins, and delayed indocyanine green dye clearance.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
