Investigating the Association of Carotid Atherosclerotic Plaque MRI Features and Silent Stroke After Carotid Endarterectomy

颈动脉内膜切除术 医学 冲程(发动机) 心脏病学 动脉内膜切除术 磁共振成像 内科学 颈动脉 放射科 机械工程 工程类
作者
Ran Huo,Wanzhong Yuan,Huimin Xu,Dandan Yang,Huiyu Qiao,Hualu Han,Tao Wang,Ying Liu,Huishu Yuan,Xihai Zhao
出处
期刊:Journal of Magnetic Resonance Imaging [Wiley]
卷期号:60 (1): 138-149 被引量:2
标识
DOI:10.1002/jmri.29115
摘要

Background The predictive value of carotid plaque characteristics for silent stroke (SS) after carotid endarterectomy (CEA) is unclear. Objective To investigate the associations between carotid plaque characteristics and postoperative SS in patients undergoing CEA. Study Type Prospective. Population One hundred fifty‐three patients (mean age: 65.4 ± 7.9 years; 126 males) with unilateral moderate‐to‐severe carotid stenosis (evaluated by CT angiography) referred for CEA. Field Strength/Sequence 3 T, brain‐MRI:T2‐PROPELLER, T1‐/T2‐FLAIR, diffusion weighted imaging (DWI) and T2*, carotid‐MRI:black‐blood T1‐/T2W, 3D TOF, Simultaneous Non‐contrast Angiography intraplaque hemorrhage. Assessment Patients underwent carotid‐MRI within 1‐week before CEA, and brain‐MRI within 48‐hours pre‐/post‐CEA. The presence and size (volume, maximum‐area‐percentage) of carotid lipid‐rich necrotic core (LRNC), intraplaque hemorrhage (Type‐I/Type‐II IPH) and calcification were evaluated on carotid‐MR images. Postoperative SS was assessed from pre‐/post‐CEA brain DWI. Patients were divided into moderate‐carotid‐stenosis (50%–69%) and severe‐carotid‐stenosis (70%–99%) groups and the associations between carotid plaque characteristics and SS were analyzed. Statistical Tests Independent t test, Mann–Whitney U ‐test, chi‐square test and logistic regressions (OR: odds ratio, CI: confidence interval). P value <0.05 was considered statistically significant. Results SS was found in 8 (16.3%) of the 49 patients with moderate‐carotid‐stenosis and 21 (20.2%) of the 104 patients with severe‐carotid‐stenosis. In patients with severe‐carotid‐stenosis, those with SS had significantly higher IPH (66.7% vs. 39.8%) and Type‐I IPH (66.7% vs. 38.6%) than those without. The presence of IPH (OR 3.030, 95% CI 1.106–8.305) and Type‐I IPH (OR 3.187, 95% CI 1.162–8.745) was significantly associated with SS. After adjustment, the associations of SS with presence of IPH (OR 3.294, 95% CI 1.122–9.669) and Type‐I IPH (OR 3.633, 95% CI 1.216–10.859) remained significant. Moreover, the volume of Type‐II IPH (OR 1.014, 95% CI 1.001–1.028), and maximum‐area‐percentage of Type‐II IPH (OR 1.070, 95% CI 1.002–1.142) and LRNC (OR 1.030, 95% CI 1.000–1.061) were significantly associated with SS after adjustment. No significant ( P range: 0.203–0.980) associations were found between carotid plaque characteristics and SS in patients with moderate‐carotid‐stenosis. Data Conclusions In patients with unilateral severe‐carotid‐stenosis, carotid vulnerable plaque MR features, particularly presence and size of IPH, might be effective predictors for SS after CEA. Evidence Level 2 Technical Efficacy Stage 2
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