Vertebrobasilar insufficiency (VBI) occurs when blood flow to the back of your brain lessens or ends. This part of your brain controls movement and balance, so VBI can lead to difficulty swallowing, dizziness and numbness. Hardening of your …

2023年7月17日 · Vertebrobasilar insufficiency (VBI) is defined by inadequate blood flow through the posterior circulation of the brain, supplied by the 2 vertebral arteries that merge to form the basilar artery. The vertebrobasilar arteries supply the …

2015年9月2日 · In this study, we attempted to assess whether signal intensities on T2 weighted noncontrast MRI views and radiological findings derived from Doppler ultrasonography may have a diagnostic value for VBI. VBI constitutes a diagnostic challenge and determination of absolute and clear-cut definitions cannot be made for thresholds of VBI.

Vertebrobasilar insufficiency (VBI) is a hemodynamic posterior circulation transient ischemic attack (TIA) caused by intermittent vertebral artery occlusion that is induced by a head rotation or extension. VBI may result from large vessel atherosclerotic disease, dissection, cervical compressive lesions, and subclavian steal phenomenon.

研究人员对1966-2017年间PubMed收录的相关研究进行检索，考察了4种隐性VBI-MRI标志（血管来源的白质高强度[WMH]、MRI定义的隐匿性脑梗死[BIs]、脑微出血[CMBs]以及血管周围间隙[PVSs]）与中风，痴呆以及死亡的相关性。

Vascular brain injury (VBI) may be an under-recognised contributor to mobility impairment. We examined associations between MRI VBI biomarkers and impaired mobility. We separately analysed Atherosclerosis Risk in Communities (ARIC) and UK Biobank (UKB) study cohorts.

2024年1月24日 · We examined associations between MRI VBI biomarkers and impaired mobility. Methods: We separately analysed Atherosclerosis Risk in Communities (ARIC) and UK Biobank (UKB) study cohorts. Inclusion criteria were no prevalent clinical stroke, and available brain MRI and balance and gait data.

MRI and CE-MRA have some advantages to CT in diagnosis of the VBI. MRI [ 1 ] The CE-MRA (Contrast-enhanced magnetic resonance angiography)had the highest sensitivity and specificity compared against the gold standard of intra-arterial angiography.

2019年1月1日 · We report evidence that MRI markers of VBI have major clinical significance. This research prompts careful evaluation of the benefit-risk ratio for available prevention strategies in individuals with covert VBI.

MRI-defined VBI was categorized based on the presence of one or more MRI-imaged cerebral infarct or parenchymal hematoma (hemorrhage), including microhemorrhage. Previous reports have described the collection and distribution of these findings in detail.