[Indication for alloplastic heart valve prosthesis].

The indication for the alloplastic substitution of the cardiac valve results from the expectation of life with natural course of the disease on the one hand and with the operative risk and late results on the other. For the diagnosis of heart diseases intracardial methods are necessary in much cases. Contraindications result from heavy myocardial and coronary changes which increase the operative risk considerably and no postoperative improvement is to be expected. In the low-pressure system the implantation of artificial cardiac valves is used cautiously and plastic methods are preferred.