一、人工半合成低硒饲料饲养大白鼠时心肌之光镜及电镜的初步观察二、低硒大鼠加附加条件时心肌之病理改变。流行病学调查研究证明,克山病区外环境水、土、粮中硒含量及内环境病区居民血硒、发硒的含量均低于非病区,硒预防克山病急发达142万人次,取得了肯定的效果,但对于硒在克山病发病中的作用以 First, the artificial semi-synthetic low-selenium feed rats when light microscopy and electron microscopy of the initial observation Second, low-selenium rats with additional conditions, the pathological changes of myocardium. Epidemiological studies have shown that Se content in water, soil and grain in Keshan ward and the content of selenium and selenium in residents in the environmental ward are lower than those in the non-ward. Selenium prevents the rapid development of Keshan disease by 1.42 million The number of people, has made a positive effect, but the role of selenium in Keshan disease