Susceptibility Vessel Sign for Intra-arterial Thrombus in Acute Posterior Cerebral Artery Infarction

Background Susceptibility vessel sign (SVS) on susceptibility-weighted imaging (SWI) has a high sensitivity and specificity to detect the intra-arterial thrombus in anterior circulation stroke. However, SVS has not been evaluated in posterior circulation stroke. Methods We reviewed the data from pat...

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Bibliographic Details
Published in:Journal of stroke and cerebrovascular diseases 2015-06, Vol.24 (6), p.1229-1234
Main Authors: Park, Min-Gyu, MD, Yoon, Chang Hyo, MD, Baik, Seung Kug, MD, PhD, Park, Kyung-Pil, MD, PhD
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Cardiovascular
Echocardiography, Transesophageal
Female
Humans
Infarction, Posterior Cerebral Artery - diagnosis
Intracranial Thrombosis - diagnosis
ischemic stroke
Magnetic Resonance Imaging
Male
Middle Aged
Neurology
posterior cerebral artery
Sensitivity and Specificity
Stroke - diagnosis
Susceptibility vessel sign
susceptibility-weighted image
Tomography, X-Ray Computed
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Summary:Background Susceptibility vessel sign (SVS) on susceptibility-weighted imaging (SWI) has a high sensitivity and specificity to detect the intra-arterial thrombus in anterior circulation stroke. However, SVS has not been evaluated in posterior circulation stroke. Methods We reviewed the data from patients with acute posterior cerebral artery (PCA) infarction within 24 hours from stroke onset. To elucidate the usefulness of SVS for the detection of intraluminal thrombus in acute PCA infarction, the frequency and location of SVS were compared with those of occlusion on magnetic resonance angiography (MRA) and hyperdense PCA sign on computed tomography (CT). Results Twenty-five patients with acute PCA infarction were enrolled in the study. The SVS was found in 92% (23 of 25). MRA showed occlusions in 64% (16 of 25). The SVS was identified in 100% (16 of 16) of patients with occlusion on MRA. Patients without occlusion on MRA also showed the SVS in 78% (7 of 9; P  = .0233). The positive SVS without occlusion on MRA was mainly identified in patients with occlusion of distal branches of PCA; P3 segment in 4 and P4 segment in 3. However, the hyperdense PCA sign on CT showed in only 8% (2 of 25) of all patients; its sensitivity was significantly lower than those of the SVS on SWI ( P  
ISSN:1052-3057
1532-8511
DOI:10.1016/j.jstrokecerebrovasdis.2015.01.021