title: Thrombectomy for clotted Björk-Shiley prostheses: is it really a proven procedure?
mesh_terms: D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D008943:Mitral Valve / Q000601:surgery; D011183:Postoperative Complications / Q000601:surgery; D013927:Thrombosis / Q000601:surgery*