Double outlet right ventricle (DORV) is a type of ventriculoarterial connection in which both great vessels arise entirely or predominantly from the right ventricle.
Comment:
During the development of the heart, the outflow tract initially connects exclusively with the primitive right ventricle and must undergo extensive remodeling to divide into a separate pulmonary artery and aorta; subsequently, there is continued remodeling to establish direct continuity from the left ventricle to the aorta. DORV encompasses a wide spectrum of anatomic arrangements and pathophysiologic disturbances. At one end of the spectrum, it mimics tetralogy of Fallot in the presence of pulmonary stenosis, or a large ventricular septal defect (VSD) in the absence of such stenosis. At the other end of the spectrum, it behaves like transposition of the great arteries with a VSD.