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主动脉—颅脑动脉粥样硬化斑块的内容物及其发生溃疡时的附壁血凝块的碎屑,可散落在血液中成为微栓子,由此造成局部缺血症状。而微栓子可经酶的作用而分解,或因栓塞致远端血管缺血扩张,使栓子移向末梢而使症状缓解。目前缺乏证实栓子发生的客观指标,临床一般只能依靠发病过程及是否存在栓子来源进行推断,而经颅多普勒(TCD)技术的发展为栓子的直接检测提供了可能。
Aortic - atherosclerotic plaque content and the occurrence of ulcers when the mural clot clots can be scattered in the blood into micro-emboli, resulting in ischemic symptoms. The role of micro-emboli can be broken down by the enzyme, or because of embolism caused by distal ischemia and dilation of blood vessels, emboli move to the distal tip and relieve symptoms. At present, there is no objective evidence to confirm the occurrence of emboli. Generally, the clinical diagnosis can only be based on the pathogenesis and the existence of emboli sources. The development of transcranial Doppler (TCD) technology provides the possibility of direct detection of emboli.