Accuracy of diffusion-weighted imaging in the diagnosis of stroke in patients with suspected cerebral infarct
Date
2013
Type:
Artículo
item.page.extent
4
item.page.accessRights
item.contributor.advisor
ORCID:
Journal Title
Journal ISSN
Volume Title
Publisher
American Heart Association
item.page.isbn
item.page.issn
item.page.issne
item.page.doiurl
item.page.other
item.page.references
Abstract
BACKGROUND AND PURPOSE:
The accuracy of diffusion-weighted imaging (DWI) for the diagnosis of acute cerebral ischemia among patients with suspected ischemic stroke arriving to an emergency room has not been studied in depth.
METHODS:
DWI was performed in 712 patients with acute or subacute focal symptoms that suggested an acute ischemic stroke (AIS), 609 of them with AIS.
RESULTS:
DWI demonstrated a sensitivity of 90% and specificity of 97%, a positive likelihood ratio of 31 and a negative likelihood ratio of 0.1 for detecting AIS. The overall accuracy was 95%. Of those patients who demonstrated abnormal DWI studies, 99.5% were AIS patients, and of those patients with normal DWI studies 63% were stroke mimics.
CONCLUSIONS:
DWI is accurate in detecting AIS in unselected patients with suspected AIS; a negative study should alert for nonischemic conditions.
Description
item.page.coverage.spatial
item.page.sponsorship
Citation
Stroke, 2013, 44(4):1169-1171
Keywords
diagnosis, diffusion-weighted imaging, stroke