Systole presses heighten, diastolic pressure drops, pressing of arteries and veins also increases accordingly. 收縮壓增高，舒張壓下降，脈壓也相應增大。
Cerebral perfusion decreases as the intracranial pressure is raised.Irreversible ischemic change occurs when cerebral perfusion pressure is below 40 mmHg. 顱內高壓發(fā)生時(shí)相對的腦灌流壓下降，腦部的循環(huán)便受到影響，當顱內高壓無(wú)法控制而腦灌流持續低于四十毫米汞柱時(shí)腦部終至缺血而死。
