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我们于1990～1994年对云南省大理市海东乡及洱源县江尾镇进行了克山病监测，结果：克山病心电图九项指标改变率平均0．98％；潜、慢型克山病检出率，大理市平均为0．67％，洱源平均为1．03％，发硒含量测定有逐年升高趋势，但仍属于病硒含量水平，大理病区病情减轻。
We conducted Keshan disease surveillance in Haidong Township, Dali City, Yunnan Province, and Jiangwei Town, Eryuan County, from 1990 to 1994. Results: The change rate of nine indicators of Keshan disease was 0.98% on average; the latent and chronic Keshan disease The detection rate was 0.67% on average in Dali City and 1.03% on average in Eryuan. The determination of selenium content increased year by year but still belongs to selenium level in disease.