TRUNCUS ARTERIOSUS
Normal Truncus
As in the case of transposition, in this situation the origin of the "great vessels" (the aorta and pulmonary arteries) is abnormal. In this case, both arise from a common "trunk". Blood from both ventricles mixes together as it all exits through the single valve exiting from the heart.
The treatment of Truncus involves sewing a flexible tube with its own valve from the right ventricle to bring blood to the pulmonary arteries.