世界上许多国家老年人的数量都在不同程度地增长,有些发达国家老年人约占人口的15～20％;我国现有老年人口九千多万人,约占总人口的9％,预测到2000年将占11％,到2025年将占20％,我国的一些大城市如上海,到2000年也将提前超过20％。由于老年人口的世界性增长,老年心脏病学 In many countries in the world, the number of the elderly is increasing to some extent. In some developed countries, the elderly account for about 15 to 20% of the population. In China, there are more than 90 million elderly people, accounting for about 9% of the total population. It will account for 11% of the population in 2000 and 20% in 2025. Some big cities in China, such as Shanghai, will also surpass 20% ahead of schedule in 2000. Due to the worldwide growth of the elderly population, elderly cardiology