<unk>  is a type of congenital<unk>  defect where the right atrium is closely associated with the left ventricle in space, and the left atrium is closely associated with the right ventricle. Although it is classified as a defect, the<unk>  is more of a spatial anomaly than a functional one, and it is possible for the<unk>  to have relatively normal functioning. The ventricles are rotated either clockwise or counterclockwise resulting in the twisting of their connection. The actual blood flow stream through the ventricles is not interrupted.
Crisscross heart
Cabot rings
Crista dividens
Vossius ring
Barrel chest
Double aortic arch
Situs ambiguus
Dextrocardia