Measurement of collateral perfusion in acute stroke: a vessel-encoded arterial spin labeling study.

Abstract:

:Collateral perfusion is important for sustaining tissue viability in acute ischemic stroke. Conventional techniques for its visualization are invasive, require contrast agents and demonstrate collateral vessels, rather than measuring perfusion directly. In this study we utilize a non-invasive, non-contrast magnetic resonance imaging (MRI)-based method to directly quantify collateral perfusion in acute stroke patients. Vessel-encoded multi-postlabeling delay arterial spin labeling (ASL) was used to separately quantify the blood flow and blood arrival time from four arteries supplying the brain in patients presenting within 18 hours of stroke onset. Twenty-nine acute ischemic stroke patients were scanned with a median time of onset to first MRI of 3 hours. Collateral perfusion at presentation was associated with tissue fate at 1-week. It sustained tissue prior to reperfusion, but was less effective than direct blood flow at maintaining tissue viability in patients who did not reperfuse. Delay in the blood arrival around the ischemic region was found at presentation and reduced over time but was not consistently associated with collateral perfusion. Vessel-encoded multi-postlabeling delay ASL provides a non-invasive tool for direct measurement of collateral perfusion and delayed blood arrival in acute stroke patients.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Okell TW,Harston GWJ,Chappell MA,Sheerin F,Kennedy J,Jezzard P

doi

10.1038/s41598-019-44417-7

subject

Has Abstract

pub_date

2019-06-03 00:00:00

pages

8181

issue

1

issn

2045-2322

pii

10.1038/s41598-019-44417-7

journal_volume

9

pub_type

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