The Effect of Pulsatility Index on Infarct Volume in Acute Lacunar Stroke.

Abstract:

PURPOSE:Lacunar stroke, in the context of small vessel disease, is a type of cerebral infarction caused by occlusion of a penetrating artery. Pulsatility index (PI) is an easily measurable parameter in Transcranial Doppler ultrasound (TCD) study. PI reflects distal cerebral vascular resistance and has been interpreted as a surrogate marker of small vessel disease. We hypothesized that an increased PI, a marker of small vessel disease, might be associated with a larger infarct volume in acute lacunar stroke. MATERIALS AND METHODS:This study included 64 patients with acute lacunar stroke who underwent TCD and brain MRI. We evaluated the association between the mean PI value of bilateral middle cerebral arteries and infarct volume on diffusion-weighted MRI using univariate and multivariate linear regression. RESULTS:The mean infarct volume and PI were 482.18±406.40 mm³ and 0.86±0.18, respectively. On univariate linear regression, there was a significant positive association between PI and infarct volume (p=0.001). In the multivariate model, a single standard deviation increase of PI (per 0.18) was associated with an increase of 139.05 mm³ in infarct volume (95% confidence interval, 21.25 to 256.85; p=0.022). CONCLUSION:We demonstrated that PI was an independent determinant of infarct volume in acute lacunar stroke. The PI value measured in acute stroke may be a surrogate marker of the extent of ischemic injury.

journal_name

Yonsei Med J

journal_title

Yonsei medical journal

authors

Kim Y,Lee H,An SA,Yim B,Kim J,Kim OJ,Kim WC,Kim HS,Oh SH,Kim J

doi

10.3349/ymj.2016.57.4.950

subject

Has Abstract

pub_date

2016-07-01 00:00:00

pages

950-5

issue

4

eissn

0513-5796

issn

1976-2437

pii

57.950

journal_volume

57

pub_type

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