CHD: Congenital heart disease, a malformation of the heart or the large blood vessels near the heart. The term "congenital" speaks only to time, not to causation; it means "born with" or "present at birth." Congenital heart disease is the most frequent form of major birth defects in newborns affecting close to 1% of ne... Found on http://www.medterms.com/script/main/art.asp?articlekey=15370