Transposition of the great vessels

A congenital heart defect.

The great vessels: the Aorta and the Pulmonary artery, originate reversely from opposite ventricles, i.e. the Aorta originates from the right ventricle instead from the left one, and the Pulmonary artery originates from the left ventricle instead from the right one.

This disorder is amenable to surgical treatment.