Abstract
Cerebrovascular disease is a cause of morbidity in HIV-infected populations. The relationship among HIV infection, brain arterial remodeling, and stroke is unclear. Large brain arteries (n = 1,878 segments) from 284 brain donors with and without HIV were analyzed to obtain media and wall thickness and lumen-to-wall ratio, and to determine the presence of atherosclerosis and dolichoectasia (arterial remodeling extremes). Neuropathologic assessment was used to characterize brain infarcts. Multilevel models were used to assess for associations between arterial characteristics and HIV. Associations between arterial characteristics and brain infarcts were examined in HIV+ individuals only. Adjusting for vascular risk factors, HIV infection was associated with thicker arterial walls and smaller lumen-to-wall ratios. Cerebral atherosclerosis accounted for one-quarter of the brain infarcts in HIV+ cases, and was more common with aging, diabetes, a lower CD4 nadir, and a higher antemortem CD4 count. In contrast, a higher lumen-to-wall ratio was the only arterial predictor of unexplained infarcts in HIV+ cases. Dolichoectasia was more common in HIV+ cases with smoking and media thinning, and with protracted HIV infection and a detectable...Continue Reading
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