<prompt> Keshan disease is an endemic cardiomyopathy found in deficiency ofSeleniumManganeseChromiumCopper  <response>: Selenium 410-H 449-H17thKeshan disease - found in children and young women residing in regions of china where dietary intake of selenium is low 20 mgd Concomitant deficiencies of iodine and selenium may worsen the clinical manifestations of cretinism. 