[Transitory malfunction of an L-Kaster mitral prosthesis. Echocardiographic and polygraphic study]

An unusual instance of transient prosthesis breakdown in a 29-yr-old woman with two L-Kaster disk prostheses for mitro-aortic defect is reported. The ECHO and polygraphic traces observed during and after breakdown are examined. It is considered that the breakdown which occurred in one prostheis only, was attributable to a small, internal thrombosis with embolism of the right lower extremity.