Abstract
A levoatrial cardinal vein is a rare cardiovascular anomaly found in a malformed heart with severe left heart obstruction. We report the prenatal diagnosis of a 23-week fetus with mitral atresia, double outlet right ventricle, premature closure of the foramen ovale and a levoatrial cardinal vein draining into the innominate vein. In a prior study performed elsewhere the levoatrial cardinal vein had been interpreted as an aortic arch perfused retrogradely, and hypoplastic left heart syndrome had been diagnosed. Prenatal management, induction at 38 weeks and postnatal studies and treatment are presented. To the best of our knowledge, this is the first prenatal diagnosis of this embryological vessel, presenting a potential pitfall for prenatal echocardiography.
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