Meanwhile, "in patients who don't have Afib, there may be some patients with bioprosthetic valves because of the [valve] size, the clot ... bioprosthetic aortic or mitral valve or both.

Our initial endocardiography examination showed severe mitral valve stenosis. All the cusps of the bioprosthesis appeared thickened, with marked subvalvular thrombosis. The patient was ...