1.序言缺血性心脏病(IHD)在多数工业化国家是男性死亡的主要病因。60年代中期以前这些国家 IHD 死亡率大都有上升的趋势,但是最近十年来,有几个国家 IHD 的死亡率已有下降趋势,其中以美国最为明显。过去尽管人们作了很多努力,尤其是在流行病学方面的努力,而这种上升的趋势并没有得到确切的介释。另外,造成目前死亡率下降的因素也还是 1. Introduction Ischemic heart disease (IHD) is the leading cause of death among men in most industrialized countries. Most of the IHD death rates in these countries were on the rise before the mid-1960s. However, the mortality rate of IHD in several countries has been declining in the recent decade, with the United States becoming the most obvious. In the past, despite the great efforts made by people, especially in epidemiological efforts, the upward trend has not been precisely explained. In addition, the factors contributing to the current decline in mortality are still