​Affecting only about 5 of 100,000 live births, single ventricle defects are complex congenital (present at birth) heart defects. In actuality this description applies to several congenital defects that differ from each other but still share one common issue: the heart has only one adequately sized functional pumping chamber or ventricle.
Some common forms of single ventricle defects are tricuspid atresia, hypoplastic left heart syndrome, double inlet left ventricle, and mitral valve atresia.
This information is provided by the Department of Surgery at the University of Colorado School of Medicine. It is not intended to replace the medical advice of your doctor or healthcare provider. Please consult your healthcare provider for advice about a specific medical condition.