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The Annals of Thoracic Surgery, Vol 32, 58-62, Copyright © 1981 by The Society of Thoracic Surgeons
DB Williams, JR Pluth and TA Orszulak
Four recently seen patients with acute, extrinsic obstruction of a
Bjork-Shiley prosthesis in the mitral position are described. In 2 of them,
the disc occluder was stuck in the closed position by a strand of chordal
tissue, which was compressed between the disc edge and valve rim. In
another patient, sticking of the disc by a similar mechanism was caused by
a suture that migrated into the valve orifice. Intermittent malfunction of
the valve in the fourth patient was related to interference with valve
opening by ventricular myocardium and occurred when the patient lay on his
right side. The mechanism of extrinsic obstruction of the Bjork-Shiley
valve and their recognition, treatment, and prevention are discussed.
ARTICLES
Extrinsic obstruction of the Bjork-Shiley valve in the mitral position
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