title: Extrinsic obstruction of the Medtronic-Hall disk valve in the mitral position.
abstract: Three cases of acute extrinsic obstruction of the Medtronic-Hall prosthesis in the mitral position are described. In 2 cases papillary muscle and in 1 case suture overhang caused sticking of the tilting disk against the valve rim. The mechanisms of extrinsic obstruction of the tilting disk valve, its recognition, and its prevention are discussed with a review of the literature.
authors.affiliation: Division of Cardiothoracic Surgery, University of Ottawa Heart Institute, Ontario, Canada.
authors.forename: R G
authors.initials: RG
authors.lastname: Masters
authors.forename: W J
authors.initials: WJ
authors.lastname: Keon
mesh_terms: D000328:Adult; D004562:Electrocardiography; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008875:Middle Aged; D008943:Mitral Valve; D008944:Mitral Valve Insufficiency / Q000601:surgery; D008946:Mitral Valve Stenosis / Q000601:surgery; D010210:Papillary Muscles; D011183:Postoperative Complications / Q000209:etiology*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D013537:Sutures