noun[ C ]medicalspecializeduk/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