1. Congenital Heart Disease - Heart Disease and Other Cardiovascular Conditions on MedicineNet.com
When is the diagnosis of congenital heart disease (CHD) usually made. What are the types of congenital heart disease. How common is congenital heart disease. When is the diagnosis of congenital heart disease (CHD) usually made?
http://www.medicinenet.com/congenital_heart_disease/article.htm

2. Down Syndrome (Trisomy 21), Cincinnati Children's Hospital Medical Center
Tests to diagnose congenital heart disease in babies with Trisomy 21. Congenital heart disease associated with Down syndrome. The overall incidence of congenital heart disease in the general population is 0.8 percent.
http://www.cincinnatichildrens.org/health/heart-encyclopedia/disease/syndrome/d...

3. eMedicine - Smith-Lemli-Opitz Syndrome : Article by Robert D Steiner, MD
Chest radiography is important in looking for congenital heart disease and/or congenital pulmonary abnormalities. Congenital heart disease is not uncommon in SLOS and can cause cyanosis or congestive heart failure.
http://www.emedicine.com/ped/topic2117.htm