[Double mitral valve combined with an intermediate type of persistent atrioventricular canal. A contribution to surgical correction (author's transl)].

A case of double mitral valve combined with an intermediate type of atrioventricular canal is reported. After repairing the cleft in the aortic cusp of the mitral valve there resulted a mitral stenosis, which could be corrected by cutting the bridge between the two mitral orifices. In regarding the genesis of double mitral valve it seems possible, that there are two different types of this congenital malformation.