How is double-outlet right ventricle identified on fetal echo?

Prepare for the Fetal Echocardiography Test. Utilize flashcards and multiple-choice questions that come with hints and explanations. Ace your exam preparation!

Double-outlet right ventricle is defined by both great arteries arising predominantly from the morphologic right ventricle. On fetal echocardiography, this is recognized when you can trace both the aorta and the pulmonary artery back to the right ventricle instead of one trunk arising from each ventricle. The left ventricle typically communicates with the right ventricle through a ventricular septal defect, so blood from the LV reaches the outflow tracts via that VSD. The exact orientation of the VSD relative to the great arteries can vary (subaortic, subpulmonary), but the key feature is that both great arteries originate from the right ventricle. This distinguishes it from normal anatomy, where the aorta comes from the left ventricle and the pulmonary artery from the right ventricle, and from other lesions like pulmonary atresia with VSD, which have a different outflow pattern.