Godwin R J
Clin Radiol. 1977 Jul;28(4):355-60. doi: 10.1016/s0009-9260(77)80139-6.
A non-invasive method for assessment of Björk-Shiley mitral and aortic heart valve movements has been developed. The Björk-Shiley tilting disc valve is described and its placement within the heart is explained. Twenty patients have been studied post-operatively with 23 valves, 10 mitral valves and 13 aortic valves, three patients having both. The method of assessment is described and consists of projecting the valve with its opaque disc marker in true profile and en face using the C arm screening system of a C.G.R. Angiorama coronary angiography unit. A cineradiograph is taken and the maximum opening angle of the valve is measured from the projected image directly or calculated from measurements taken from the image. Movement of the valve ring can also be assessed when paraprosthetic leak is suspected. The results of the study show that: (1) This method is simple, non-invasive, requires no preparation and is reproducible. (2) The valve discs open to a smaller angle than expected in most cases, and in only a few cases to 60 degrees or more. (3) It is valuable to record valve function post-operatively so that a comparison can be made later should valve malfunction be suspected. (4) In only one case was it found impossible to assess valve movement because of orientation of the valve within the patient.
已开发出一种用于评估 Björk-Shiley 二尖瓣和主动脉瓣运动的非侵入性方法。文中描述了 Björk-Shiley 倾斜盘式瓣膜，并解释了其在心脏中的放置位置。对 20 名患者进行了术后研究，共涉及 23 个瓣膜，其中 10 个二尖瓣和 13 个主动脉瓣，3 名患者同时有这两种瓣膜。描述了评估方法，该方法包括使用 C.G.R. Angiorama 冠状动脉造影设备的 C 臂筛查系统，以真实轮廓和正面投影带有不透明盘状标记物的瓣膜。拍摄一张电影血管造影片，直接从投影图像中测量瓣膜的最大开口角度，或根据从图像中获取的测量值进行计算。当怀疑人工瓣膜旁漏时，也可以评估瓣膜环的运动。研究结果表明：(1) 该方法简单、非侵入性，无需准备且可重复。(2) 在大多数情况下，瓣膜盘张开的角度比预期小，只有少数情况能达到 60 度或更大。(3) 术后记录瓣膜功能很有价值，以便日后怀疑瓣膜出现故障时能够进行比较。(4) 仅在 1 例中，由于瓣膜在患者体内的取向，发现无法评估瓣膜运动。
