RESUMO
Objective To monitor the prevalence of Keshan disease in Huangling County, Shaanxi Previnee in 2007. Methods All local residents in surveinance area of Keshan disease in Diantou and Yaoping Township of Huangling County, were surveyed and given overall examinations by electrocardiography. The patients of latent and chronic Keshan disease were examined by X-ray. The selenium contents in blood and hair were monitored by fluorospectrophotometry in surveillance and non-surveillance areas. Results No new ease of acute or sub-acute patient was found. Latent and chronic patients detected accounted for 3.92% (35/893). Only 1 ease of new latent Keshan disease was newly found. Major feature of electrocardiographic abnormality was ST-T change. By X-ray, there were 27 eases with a normal heart, 20 eases with mild enlargement, 20 eases with medium enlargement, and 16 eases with marked enlargement. Serological selenium eoncentrations were (38.67±19.58), (48.55±22.36), (67.29±17.32)μg/L, respectively in patients, internal and external eontrols(F=16.291 ,P<0.01). Selenium contents of children's hair were (0.376±0.101), (0.372±0.085), (0.436±0.085)μg/L, respectively(F= 17.032, P<0.01). Conclusions Cases of diagnosed Keshan disease were decreased compared with the previous years. There were new eases of latent Keshan disease in Huangling County, Shaanxi Province.