实验证明，当小动脉发生持续性收缩时，骨胳肌发生痉挛跳动，肢体麻木等现象。
Experiments have proved that when the arteriole produce durative contraction, skeletal muscle cramps occur, numbness, etc.
但大动脉CVS表现无法完全解释如“有血管痉挛无症状”和“有症状而无血管痉挛”等临床现象，最终的影响因素可能是微循环改变。
Not all clinical findings can be well explained by CVS of major arteries, such as ischaemia without CVS, or CVS without ischaemia, the real determinant factors may relate to cerebral microcirculation.
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