Japanese Journal of Cardiovascular Surgery Vol46,No5

Bjo¨rk-Shiley Prosthetic Valve Dysfunction Caused by Complete Disc Fracture

Kazuya Terazono* Takayuki Ueno* Kenji Toyokawa*
Yoshihiro Fukumoto* Masafumi Yamashita* Yukinori Moriyama*

(Division of Cardiovascular Surgery, Kagoshima Medical Center, National Hospital Organization*, Kagoshima, Japan)

We present herein a case of disc fracture of a Bjo¨rk-Shiley valve prosthesis in the mitral position. A 69-year-old woman was admitted to our hospital with a sudden onset of dyspnea followed by deep shock. An echocardiography showed a severe degree of mitral regurgitation and moderate degree of tricuspid regurgitation. Forty-three years previously she had undergone a mitral valve replacement(MVR)for stenosis with the original version of a Bjo¨rk-Shiley valve prosthesis in another institute. Emergency redo MVR was performed with a bioprosthesis and tricuspid annuloplasty with a semirigid ring. The disc of the extracted Bjo¨rk-Shiley valve was found to have escaped from the metal housing with two intact struts. Although Bjo¨rk-Shiley valve dysfunction due to Delrin disk abration has been rarely reported, complete disk fracuture is extremely rare. The important role of regular echocardiographic follow-up should be emphasized to prevent fatal valve fracture.


Jpn. J. Cardiovasc. Surg. 46:247-250(2017)

Keywords:prosthetic valve dysfunction;Bjo¨rk-Shiley valve;disc fracture

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