Albrechtsson U G, Thulin L I, Olin C L
Scand J Thorac Cardiovasc Surg. 1987;21(1):91-5. doi: 10.3109/14017438709116927.
In 46 patients, 51 Björk-Shiley monostrut valves were studied with high-speed cineradiography 9 months after implantation. Each valve was viewed in lateral, frontal and oblique projections for 10-12 heart beats. In the aortic valves the opening time was 0.04-0.067 (mean 0.052) and closing time 0.04-0.067 (mean 0.046) sec. In all these valves the maximum opening angle was 70 degrees. Disc rotation could be monitored in 29/31 valves, and during 10 heart beats averaged 20 degrees. Disc slide of 2.0-2.5 mm was seen in 27/31 valves. It occurred during the last 40-50 degrees of opening and the first 20-40 degrees of closing. In mitral valves with sinus rhythm (12/20), the opening time was 0.053-0.106 (mean 0.073) and closing time 0.040-0.106 (mean 0.061) sec. Mean disc rotation (recorded in 17/20 valves) during 10 heart beats was 25 degrees, and disc slide of 2.0-2.5 mm was found in all but one case, mainly during the last 50 degrees of opening and the first 30 degrees of closing. The valve opened to 70 degrees in all but one patient, in whom the disc clearly impinged against the left ventricular wall and opened only to 35-50 degrees at rest. At reexamination a year later the patient was asymptomatic, in sinus rhythm, and the disc had regained full movement with 70 degrees opening.
对46例患者体内植入的51枚Björk-Shiley单叶瓣膜在植入9个月后进行了高速电影摄影研究。对每个瓣膜在侧位、正位和斜位投影下观察10 - 12个心动周期。主动脉瓣的开放时间为0.04 - 0.067秒（平均0.052秒），关闭时间为0.04 - 0.067秒（平均0.046秒）。所有这些瓣膜的最大开放角度为70度。在31枚瓣膜中的29枚可监测到瓣片旋转，在10个心动周期内平均旋转20度。在31枚瓣膜中的27枚可见瓣片滑动2.0 - 2.5毫米。其发生在开放的最后40 - 50度和关闭的最初20 - 40度期间。在窦性心律的二尖瓣（20枚中的12枚）中，开放时间为0.053 - 0.106秒（平均0.073秒），关闭时间为0.040 - 0.106秒（平均0.061秒）。在10个心动周期内，20枚瓣膜中的17枚记录到平均瓣片旋转为25度，除1例之外，在所有病例中均发现瓣片滑动2.0 - 2.5毫米，主要发生在开放的最后50度和关闭的最初30度期间。除1例患者外，所有患者的瓣膜开放至70度，该例患者的瓣片明显撞击左心室壁，静息时仅开放至35 - 50度。一年后复查时，该患者无症状，为窦性心律，瓣片已恢复完全活动，开放角度为70度。
