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近年的研究发现，脑血管痉挛（ＣＶＳ）分为两个阶段，即急性ＣＶＳ和慢性ＣＶＳ。前者为动脉平滑肌痉挛所致的可逆性血管收缩；后者是血管壁本身器质性增厚而形成的管径狭小，是临床上症状性缺血的主要原因。慢性ＣＶＳ尚无理想的治疗方法，治疗应放在早期预防上面［１］。本?
Recent studies have found that cerebral vasospasm (CVS) is divided into two stages, acute CVS and chronic CVS. The former is reversible vasoconstriction caused by arterial smooth muscle spasm. The latter is a small diameter formed by the thickening of the vascular wall itself and is the main cause of clinical symptoms of ischemia. Chronic CVS no ideal treatment, treatment should be placed on the early prevention [1]. this?