Cineradiog raphic evaluation of the opening angle and ring motion of the Björk-Shiley valves in the aortic position

Abstract

The 22 Björk-Shiley valves were evaluated by cineradiographic examination. The opening angle was 58.6°±3.7° by Sohma's method and 59.3°±4.2° by Verdel's method. The ring motion was a 3°±1.5°. The 2 detached valves showed tilting motion of the ring and poor opening angle with fluttering phenomena of the disc.