Two cases of double-outlet left ventricle detected prenatally.

Double-outlet left ventricle is an exceedingly rare congenital heart defect. Its prenatal detection and precise anatomical definition are challenging for a variety of reasons and have never been previously reported. Here described are 2 cases of prenatally diagnosed double-outlet left ventricle. The technical limitations of prenatal diagnosis and its implications for the surgical management of patients affected by such a rare condition are discussed.