Relationship between brain large artery characteristics and their downstream arterioles.

Abstract:

:We aimed to test the hypothesis that brain large artery diameters relate to distal downstream arteriolar diameters. In a sample of 110 autopsied individuals (69% men, 76% HIV+, mean age 51), we used multilevel models to relate large artery lumen and lumen-to-wall ratio to left frontal lobe arteriolar lumen and lumen-to-wall ratio adjusting for demographics and vascular risk factors. Comparing the large artery characteristics of the whole brain did not disclose significant associations with frontal lobe arteriolar characteristics. However, restricting the comparison to large arteries upstream of the studied arterioles demonstrated an independent association between left-sided frontal lobe arteriolar luminal diameter with large artery luminal diameters (B = 1.82 ± 0.77, P = 0.01) and with large artery lumen-to-wall ratio (B = 0.58 ± 0.29, P = 0.05). In stratified models, the point estimates in the HIV+ subsample were larger than in the HIV- subsample. These finding suggest coupling between higher proximal blood flow represented by large artery diameter and lower distal resistance represented by arteriolar dilatation. The relationship between arteriolar dilatation and brain parenchyma homeostasis should be further studied.

journal_name

J Neurovirol

journal_title

Journal of neurovirology

authors

Gutierrez J,Murray J,Chon C,Morgello S

doi

10.1007/s13365-017-0606-0

subject

Has Abstract

pub_date

2018-02-01 00:00:00

pages

106-112

issue

1

eissn

1355-0284

issn

1538-2443

pii

10.1007/s13365-017-0606-0

journal_volume

24

pub_type

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