Clinical and echocardiographic manifestations of a thrombosed Bjork-Shiley aortic valve.

A 36-year-old woman with a Bjork-Shiley prosthetic aortic valve developed acute congestive heart failure and pulmonary edema. She was found to have a new diastolic murmur, absence of valve clicks, and an immobile prosthetic disk as shown by echocardiography. At surgery the valve, which was covered with fibrin and thrombus, was replaced, and she did well following operation.