克山病是一种原因未明的慢性病程的地方性心肌病。临床上根据心脏功能分为四个临床型,即急型、亚急型、慢型和潜在型。在发病上有一定的地区、时间和人群多发的特点。 全国十四省、自治区有本病发生。经大量长期现场调查证明,本病主要发生在病区自产自给农民社员之间;发病人群主要为生育期妇女和断奶后学龄前儿童;西南地区、山东地区 Keshan disease is a chronic local disease of unknown cause of local cardiomyopathy. Clinically based on cardiac function is divided into four clinical types, namely acute, subacute type, slow type and potential type. In the incidence of a certain area, time and population characteristics. Fourteen provinces and autonomous regions have the disease. After a large number of long-term field surveys prove that the disease occurs mainly in the ward self-produced farmers themselves; the incidence of the main group of women and the post-weaning pre-school children; Southwest China, Shandong