Letter by Tian and Lou Regarding Article, “Clinical Significance of Fluid-Attenuated Inversion Recovery Vascular Hyperintensities in Borderzone Infarcts”
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To the Editor:
We have read Kim et al’s article about the prognostic significance of fluid-attenuated inversion recovery vascular hyperintensities (FVHs) in patients with borderzone infarcts.1 FVH is produced by lack of flow-void signal and represents slow anterograde or retrograde blood flow distal to the arterial occlusion or stenosis. Presence of FVH has been regarded as an magnetic resonance marker representing relatively good collateral circulation. However, Kim et al reported opposite findings. In their study, FVHs were associated with higher initial National Institutes of Health Stroke Scale scores and nonfavorable outcomes at 3 months in patients with cortical borderzone (CBZ) infarcts. The authors speculated that in patients with CBZ infarcts, patients with FVH could be much more influenced by hemodynamic impairment than those without FVH. The patients with FVH have a higher portion of severe …