[Secundum atrial septal defect with prolonged atrioventricular conduction: an autosomal dominant hereditary cardiac defect (author's transl)].

Secundum ASD was diagnosed in five members of three generations of one family. Three of them had prolonged A-V conduction. These findings and those reported in the literature suggest that the combination of secundum ASD with prolonged A-V conduction is an autosomal dominant hereditary disease.