Saunders C R, Rossi N P, Rittenhouse E A
J Cardiovasc Surg (Torino). 1977 Nov-Dec;18(6):571-4.
Failure of a Björk-Shiley mitral valve prosthesis to open was recognized early in the postoperative period and required immediate replacement. The clinical finding was sudden, intermittent, severe hypotension associated with absent poppet sounds and simultaneous elevation in left atrial pressure. This unique and unusual hemodynamic picture was duplicated in four animal experiments. Routine monitoring of left atrial pressure is a useful postoperative adjunct that can provide early documentation of obstruction to left atrial outflow. Early recognition of the problem and immediate operative correction are mandatory.
Björk-Shiley二尖瓣人工瓣膜未能打开在术后早期被识别出来，需要立即进行置换。临床发现为突然出现的、间歇性的严重低血压，伴有瓣叶扑动音消失以及左心房压力同时升高。这种独特且不寻常的血流动力学表现在四项动物实验中得到了重现。常规监测左心房压力是一项有用的术后辅助手段，可提供左心房流出道梗阻的早期证据。必须尽早识别问题并立即进行手术矫正。
