label: right atrial isomerism
label_lc: right atrial isomerism
description: A visceral heterotaxy characterized by complete atrioventricular septal defect with a common atrium and univentricular AV connection, total anomalous pulmonary drainage, and transposition or malposition of the great arteries and may be associated with bilateral trilobed lungs, midline liver, asplenia and situs inversus affecting other organs that has material basis in homozygous mutation in the GDF1 gene on chromosome 19p12.