Congenital heart defect (CHD), also known as a congenital heart anomaly or congenital heart disease, is a problem in the structure of the heart that is present at birth.Signs and symptoms depend on the specific type of problem. Symptoms can vary from none to life- threatening.The cause of a congenital heart defect is often unknown.Most congenital heart problems do not occur with other diseases. Complications that can result from heart defects include heart failure.More info visit: http://www.elabscience.com