In this study, we used the susceptibility-weighted imaging and mapping technique (SWIM) to investigate the effect of vessel susceptibility when evaluating the severity of cerebral infarction to develop an early prognosis of patients with middle cerebral artery thrombosis. By analyzing thrombus length, thrombus susceptibility, clot burden score, and the Admission and Discharge National Institute of Health Stroke Scale (NIHSS) scores between groups divided by the presence or absence of a deep medullary vein (DMVs) and between groups divided by the presence or absence of an asymmetrically prominent cortical vein (APCVs), we found that patients with a DMVs or APCVs were not affected by the burden factors of a thrombus. Compared to an APCV, a DMV suggests the presence of a larger cerebral infarction and is associated with an increased discharged NIHSS score, indicating a poor short-term prognosis.
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