[A new method for patch enlargement of hypoplastic aortic annulus. An experimental study (author's transl)].

The purpose of this communication is to propose a new surgical procedure to enlarge the hypoplastic aortic valve ring of more than 20 mm and to permit the replacement of the aortic valve with a suitable prosthesis. The aortic incision is extended about 20 mm across the fibrous origin of the mitral ring downwards into the aortic leaflet of the mitral valve. A fusiform Dacron patch was sutured to the defect in the aortic leaflet of the mitral valve with running suture lines. In acute experiments mitral valve abnormalities are excluded by hemodynamic data, angiocardiography and echocardiography.