脑血管病是一个非常重大的世界性健康问题。据目前流行病学调查,中、老年人口中,10个人至少有1人发生脑血管意外;脑卒中的住院死亡率将继续保持在25％,而且仍将是北美地区仅位于冠心病和癌症之后的第3大死亡原因。更为重要的是大约90％的脑卒中存活者遗留有严重的神经系统功能缺损。就加拿大和美国而言,脑卒中给患者及社会各方面造成的直接和间接损失,目前每年已超过100 Cerebrovascular disease is a very significant global health problem. According to the current epidemiological survey, at least one out of 10 people in the middle-aged and elderly population is suffering from cerebrovascular accidents; in-hospital mortality from stroke will continue to be 25% and will remain the only cause of coronary heart disease and cancer in North America The 3rd largest cause of death. More importantly, about 90% of stroke survivors have serious neurological deficits. In the case of Canada and the United States, the direct and indirect loss of stroke and all aspects of society is currently over 100 per year