脑卒中在西方国家居民死因中占第3位,仅次于冠心病和恶性肿瘤。进一步明确脑卒中的危险因素,及早进行预防,对降低该病的发病率与死亡率有十分重要的意义。Ressina等人最近在流行病学研究中讨论了西方国家近年脑卒中发病率较高的因素最主要的有高血压控制不利和吸烟人数增加。脑卒中的危险因素与冠心病基本相同,近年认为首先是高血压病。Macmahon等人在对42 000例脑卒中的危险因素进行研究时发现,舒张期高血压与脑卒中之间存在令人信服的联系。对这种高血压进行及时有效治疗2～3年后脑卒中的发病率比对照组下降42％。舒张期高血压必须及时进行治疗的观点已得到学者们的一致赞同。但是对单纯收缩期高血压尚未引起足够重视,其实这种高血压在老年人中很常见并随衰老而增 Stroke occupies the third place in the cause of death of residents in Western countries, second only to coronary heart disease and malignant tumors. To further clarify the risk factors of stroke, early prevention is of great importance to reduce the morbidity and mortality of the disease. Ressina et al. Recently discussed in epidemiological studies the high incidence of stroke in Western countries in recent years, the most important factors have adverse effects of high blood pressure control and increase the number of smokers. The risk factors for stroke and coronary heart disease is basically the same, in recent years that the first is hypertension. In a study of 42,000 stroke risk factors, Macmahon et al found that there was a convincing connection between diastolic hypertension and stroke. The incidence of stroke after 2 to 3 years of timely and effective treatment of this high blood pressure is 42% lower than that of the control group. Diastolic hypertension must be promptly treated point of view has been unanimously agreed by scholars. However, the simple systolic hypertension has not been given enough attention, in fact, this hypertension is very common in the elderly and increased with aging