What Steps Should be Taken for Detection of Occult / Hidden Cases of Congenital Heart Disease CHD? Since there are still a large number of occult/hidden/ asymptomatic cases of CHD, especially of the late cyanotic or acyanotic (in which cyanosis does not occur) group, urgent steps are required to be taken for their early detection. Such cases can be detected in various camps, especially in schools/ colonies, etc. However, in many of the late diagnosed cases, as described...