A cyanotic infant has echocardiographic evidence of a univentricular heart (UVH). The following is/are true:

b. To be classified as a ventricle, the chamber must receive at least half of an inlet valve

c. This infant is a good candidate for a Blalock-Taussig shunt

d. Optimal correction of UVH diverts all vena caval blood flow into the pulmonary arteries (Fontan procedure)

e. In the absence of pulmonic stenosis, UVH usually presents as congestive heart failure

Univentricular heart is defined by the connection of the atria to only one ventricular chamber, usually the left as a double inlet left ventricle. A chamber must receive at least half of an inlet valve to be considered a ventricle. The presentation of UVH depends on the pulmonary blood flow; if pulmonary stenosis is present there is increased cyanosis and the infant is a candidate for a Blalock-Taussig shunt. In the absence of pulmonic stenosis, pulmonary flow is excessive and the presentation is congestive heart failure. Optimal correction of UVH diverts all vena caval flow into the pulmonary arteries as the Fontan procedure.