老年人口迅速增加,在美国≥65岁的老年人口增长速度已超过人口的增长率,但就死亡原因分布心脏病居首位,癌症和脑血管病分别列第二、三位。我国三十年来人口死亡原因也发生剧大变化,老年多发的心脏病1975年已跃居全国死亡原因第一位,1982年我国城市死亡原因中脑血管病占第一位.由此可见冠心病(CHD)和脑血 Elderly population is rapidly increasing. In the United States, the elderly population ≥65 years of age has exceeded the population growth rate, but the distribution of causes of death ranks first in the world in terms of heart disease. Cancer and cerebrovascular diseases rank second and third respectively. The cause of death in our country has also changed drastically in three decades. The number of elderly patients with heart disease has risen to first place in the cause of death in 1975, and the first cause of death from cardiovascular disease in China in 1982. This shows that coronary heart disease (CHD) and cerebral blood