Abstract
We report the case of a 40-year-old woman whose Sorin tilting disc mitral prosthesis was obstructed by fibrous overgrowth to the point of near occlusion. The unusual features of this case are that the patient survived reoperation and that her preoperative symptoms were mild despite an immobile disc and near occlusion of the valve. In most similar cases in the literature, preoperative symptoms have been acute and mortality has been high.
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