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Retinal vascular parameter variations in patients with human immunodeficiency virus
Petrina B Tan1, Owen K Hee, Carol Cheung
1Ophthalmology, National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore.
Investigative Ophthalmology & Visual Science
|November 2, 2013
Summary
Patients with human immunodeficiency virus (HIV) infection exhibit altered retinal vasculature, with increased tortuosity. Higher HIV viral loads correlate with narrower retinal arterioles and reduced arteriolar-venular ratio.
Area of Science:
- Ophthalmology
- Infectious Diseases
- Vascular Biology
Background:
- Human immunodeficiency virus (HIV) infection is associated with systemic complications, including vascular changes.
- Retinal vascular imaging offers a non-invasive method to assess microvascular alterations in various systemic diseases.
Purpose of the Study:
- To compare retinal vascular parameters between individuals with HIV and healthy controls.
- To investigate the relationship between retinal vascular parameters and HIV-related biomarkers such as CD4 count and HIV RNA levels.
Main Methods:
- A case-control study involving 85 HIV patients and 251 matched healthy controls.
- Standardized retinal photographs were analyzed using a semiautomated computer program to quantify retinal vascular caliber, branching angle, tortuosity, and fractal dimension.
Main Results:
- HIV patients demonstrated significantly increased arteriolar and venular tortuosity compared to controls.
- Higher HIV viral loads were associated with reduced retinal arteriolar caliber and a decreased arteriolar-venular ratio.
Conclusions:
- Patients with HIV display significant alterations in retinal vasculature.
- Retinal vascular imaging holds potential for understanding the vascular pathophysiology of HIV infection.
