[Replacement of mitral and aortic valve of a 12 years old boy (author's transl)].

Report of the case of a 12 years old boy, who because of acquired mitral valve insufficiency (grades II--III), after an illness of virus-carditis, became, in the first instance, a Bjoerk-Shiley-Ventil M27 prosthetic valvular replacement, and after 3 months, in one sitting, correction of a paravalvular leakage and prosthetic valvular replacement of the insufficient aortic valve with a Bjoerk-Shiley A23. The boy was well rehabilitated one year after the last operation. This is supported by the similar results of the echocardiographic, the ergometric and the pulmonary function tests carried out. The size of the replaced prosthetic valve makes the long time prognosis favourable. Double-valvular prosthetic replacement in children was hitherto carried out predominantly as a result of rheumatic diseases. The rheumatic process as well as congenital valvular malformation could surely be excluded in our patient so that the virus-process seems to be the most likely cause of the valvular defect.