atrial septal defect
noun [ C ] medical specialized uk/ˌeɪ.tri.əl ˈsep.təl diː.fekt/ us/ˌeɪ.tri.əl ˈsep.təl diː.fekt/ (abbreviation ASD)
房间隔缺损，心房间隔缺损
a problem, present from birth, in which blood from the left atrium (= one of the top spaces) of the heart passes directly into the right atrium resulting in too much fluid in the right side of the heart and possible heart failure