最近,对高血压脑病的病因正进行着广泛的评论。根据Byrom的经典假说,高血压脑病系由于缺血及继后的水肿所致。而血压过高引起的血管痉挛则是缺血的原因。按照这一假说,血管痉挛是关键。正常时,如血压升高,血管便自动调节而收缩,使脑血流保持恒定。Byrom设想,某些高血压病人这种反应过强,以致产生痉挛及缺血。 Recently, the etiology of hypertensive encephalopathy is undergoing extensive reviews. According to Byrom’s classic hypothesis, hypertensive encephalopathy is due to ischemia and subsequent edema. The high blood pressure caused by vascular spasm is the cause of ischemia. According to this hypothesis, vasospasm is the key. Normal, such as blood pressure, blood vessels will automatically adjust and shrink, so that blood flow remains constant. Byrom envisions that in some hypertensive patients this reaction is too strong, resulting in spasms and ischemia.