目的通过DSA观察无症状大脑中动脉闭塞患者的侧支循环代偿状态。方法回顾性连续纳入2018年10月-2022年2月邢台市第九医院收治的经DSA确诊的无症状性大脑中动脉闭塞患者(无症状闭塞组),并选择同期经DSA检查确诊为症状性急性大脑中动脉闭...目的通过DSA观察无症状大脑中动脉闭塞患者的侧支循环代偿状态。方法回顾性连续纳入2018年10月-2022年2月邢台市第九医院收治的经DSA确诊的无症状性大脑中动脉闭塞患者(无症状闭塞组),并选择同期经DSA检查确诊为症状性急性大脑中动脉闭塞且进行了血管内治疗的患者作为对照组(症状性闭塞组)。收集患者的人口学信息、血管危险因素。对两组的DSA检查结果进行再评估,采用美国介入治疗神经放射学学会(American Society of Interventional and Therapeutic Neuroradiology,ASITN)/介入放射学学会(Society of Interventional Radiology,SIR)标准评估侧支循环状态。比较两组的ASITN/SIR评分差异。结果共纳入39例患者,无症状闭塞组17例,症状性闭塞组22例,症状性闭塞组高同型半胱氨酸血症病史发生率高于无症状闭塞组,两组其余基线资料差异无统计学意义。无症状闭塞组中ASITN/SIR评分2级2例(11.8%)、3级6例(35.3%)、4级9例(52.9%),症状性闭塞组中ASITN/SIR评分0级3例(13.6%)、1级8例(36.4%)、2级6例(27.3%)、3级3例(13.6%)、4级2例(9.1%),两组差异有统计学意义(P<0.001),无症状闭塞组的侧支循环代偿更优。结论无症状大脑中动脉闭塞患者比症状性大脑中动脉闭塞患者具有更好的侧支循环代偿。展开更多
We observed an exchange bias effect in La0.5Ca0.5FeO3 perovskite compound.The exchange bias is associated with the charge disproportionation transition from Fe4+ions to Fe3+and Fe5+ions below 175 K.The competition bet...We observed an exchange bias effect in La0.5Ca0.5FeO3 perovskite compound.The exchange bias is associated with the charge disproportionation transition from Fe4+ions to Fe3+and Fe5+ions below 175 K.The competition between the ferromagnetic interaction of Fe3+and Fe5+ions and the antiferromagnetic one of Fe3+and Fe3+ions results in a unidirectional anisotropy in the cluster-glass system.An antiferromagnetically interfacial exchange coupling constant Ji1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.展开更多
文摘目的通过DSA观察无症状大脑中动脉闭塞患者的侧支循环代偿状态。方法回顾性连续纳入2018年10月-2022年2月邢台市第九医院收治的经DSA确诊的无症状性大脑中动脉闭塞患者(无症状闭塞组),并选择同期经DSA检查确诊为症状性急性大脑中动脉闭塞且进行了血管内治疗的患者作为对照组(症状性闭塞组)。收集患者的人口学信息、血管危险因素。对两组的DSA检查结果进行再评估,采用美国介入治疗神经放射学学会(American Society of Interventional and Therapeutic Neuroradiology,ASITN)/介入放射学学会(Society of Interventional Radiology,SIR)标准评估侧支循环状态。比较两组的ASITN/SIR评分差异。结果共纳入39例患者,无症状闭塞组17例,症状性闭塞组22例,症状性闭塞组高同型半胱氨酸血症病史发生率高于无症状闭塞组,两组其余基线资料差异无统计学意义。无症状闭塞组中ASITN/SIR评分2级2例(11.8%)、3级6例(35.3%)、4级9例(52.9%),症状性闭塞组中ASITN/SIR评分0级3例(13.6%)、1级8例(36.4%)、2级6例(27.3%)、3级3例(13.6%)、4级2例(9.1%),两组差异有统计学意义(P<0.001),无症状闭塞组的侧支循环代偿更优。结论无症状大脑中动脉闭塞患者比症状性大脑中动脉闭塞患者具有更好的侧支循环代偿。
基金supported by the National Basic Research Program of Chinathe National Natural Sciences Foundation of China(Grant No.11205015)+1 种基金the Natural Sciences Foundation of Beijing(Grant No.1113017)Beijing Area Logistics System&Technology Major Laboratory and the Logistics Management and Engineering Innovation Platform of Beijing Wuzi University
文摘We observed an exchange bias effect in La0.5Ca0.5FeO3 perovskite compound.The exchange bias is associated with the charge disproportionation transition from Fe4+ions to Fe3+and Fe5+ions below 175 K.The competition between the ferromagnetic interaction of Fe3+and Fe5+ions and the antiferromagnetic one of Fe3+and Fe3+ions results in a unidirectional anisotropy in the cluster-glass system.An antiferromagnetically interfacial exchange coupling constant Ji1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.
