title: Acute intermittent obstruction of a Björk-Shiley mitral valve: a case report.
mesh_terms: D000208:Acute Disease; D001794:Blood Pressure; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery*; D011183:Postoperative Complications