Chest
-
A second case of malfunction of a Harken disk valve due to undue disk wear is reported. Two and one-half years after aortic and mitral valvular replacement, the patient had paraprosthetic aortic insufficiency and physical findings suggesting intermittent dysfunction of his prosthetic mitral valve. ⋯ At operation, the excised valve showed normal struts and sewing ring but severe disk wear. There was loss of disk substance and rim notching.