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- W45525069 abstract "OBJECTIVE: We sought to define whether diffusion tensor imaging (DTI)-based quantitative assessment of the degree of ischemic injury to the corticospinal tract (CST) correlates with motor impairment clinical scores at each phase of ischemic stroke and whether the early CST changes predict the final motor outcome after stroke. BACKGROUND: Motor impairment is the leading form of disability after ischemic stroke and has been related to ischemic lesion location and size, and age. Direct injury to CST likely is a major contributing factor of present and subsequent motor impairment. Diffusion tensor tractography analysis allows the definition of white matter tracts, mainly the CST. DESIGN/METHODS: We prospectively evaluated patients with ischemic stroke at the acute (2-7 days), subacute (30 days) and outcome (90 days) phases with DTI and upper extremity Fugl-Meyer assessment (UE-FM). The CST was reconstructed based on DTI images that were acquired in a 3T MRI unit. Virtual fiber numbers (FN) were calculated for the affected and contralateral unaffected CST at each time point. Spearman9s correlation coefficients were computed for the correlation between FN ratio (affected/unaffected CST) and the UE-FM at each time point. A multivariable regression model for outcome UE-FM score prediction was also developed. RESULTS: We studied 22 patients, 13 (59%) were men, age was 67(±12.5) years. Ischemic lesion location was: cortically-based hemispheric (n=16), subcortical (n=5), brainstem/cerebellum (n=1). The FN ratio significantly correlated with UE-FM scores at each time point (Acute: r=0.51, p=0.032; Subacute: r=0.56, p=0.0096; Outcome: r=0.62, p=0.0044). Baseline FN ratio significantly predicted outcome UE-FM score at outcome (p=0.008). CONCLUSIONS: The degree of CST involvement by ischemic stroke on DTT strongly correlates with the degree of motor impairment at each phase of ischemic stroke. The baseline FN predicts motor outcome. DTI-derived CST assessment could become a surrogate marker of motor impairment in the design of future restorative clinical trials. Supported by: 1) NIH-NINDS Grant R01 NS70922, 2) Mort and Brigitte Harris Stroke Fund. Disclosure: Dr. Maraka has nothing to disclose. Dr. Jiang has nothing to disclose. Dr. Jafari-Khouzani has nothing to disclose. Dr. Hamidian has nothing to disclose. Dr. Li has nothing to disclose. Dr. Malik has nothing to disclose. Dr. Zhang has nothing to disclose. Dr. Lu has nothing to disclose. Dr. Soltanian-Zadeh has nothing to disclose. Dr. Mitsias has nothing to disclose." @default.
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- W45525069 date "2013-02-12" @default.
- W45525069 modified "2023-09-26" @default.
- W45525069 title "Quantitative Assessment of Corticospinal Tract Injury on Diffusion Tensor Imaging Correlates with Motor Outcome after Ischemic Stroke (P03.163)" @default.
- W45525069 hasPublicationYear "2013" @default.
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