中膜层病理学改变是可逆性的，但已失去血管舒缩功能，仅具生物支架作用。
The pathological changes of tunica media were reversible, without vasomotion and play a stent role only.
TCD直接显示脑动脉的主干，对头晕、头痛患者脑血管舒缩状况及脑供血改变评价较好。
But TCD detected the flow of main cerebral artery, good at assessing vasomotor reactivity and cerebral hemoperfusion on patients suffered from vertigo and headache.
TCD直接显示脑动脉的主干，对头晕、头痛患者脑血管舒缩状况及脑供血改变评价较好。
But TCD detected the flow of main cerebral artery, good at assessing vasomotor reactivity and cerebral hemoperfusion on patients suffered from vertigo and headache.
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