Prenatal diagnosis of isolated total anomalous systemic venous connection to the left atrium.

We report the prenatal diagnosis and the neonatal follow-up of a patient with isolated total abnormal systemic venous connection to the left atrium. Right-sided and left-sided superior caval veins and the inferior caval vein were all connected to the left atrium. Pulmonary venous return was normal. This was associated with some right ventricular underdevelopment. To our knowledge, this is the first fetal description of this very rare congenital cardiac malformation.