Fate of thrombectomized Björk-Shiley valves. A long-term cinefluoroscopic, echocardiographic, and hemodynamic evaluation.

Fourteen patients underwent thrombectomy for thrombosis of implanted Björk-Shiley valves (13 in the mitral and one in the aortic position) between January, 1975, and July, 1984. There was no operative mortality or perioperative embolism. Over a follow-up period of 1 to 96 months (average 23.

Valve replacement in children under twenty years of age. Experience with the Björk-Shiley prosthesis.

Prosthetic valve replacement in young patients has been reported to be associated with a high mortality and morbidity because of valve-related problems. Of 549 patients undergoing valve replacement with the Björk-Shiley valve prosthesis, 136 were under the age of 20 years. Sixty-four patients were under 16 years of age, the youngest being 6 years old.

Thrombotic obstruction of Bjork-Shiley valves--diagnostic and surgical considerations.

We have evaluated 12 patients with thrombotic obstruction of the Bjork-Shiley valve since 1975, 11 in the mitral and 1 in the aortic position. During this period 442 patients with 303 mitral (181 plano-convex and 122 convexo-concave) and 205 aortic (112 plano-convex and 93 convexo-concave) Bjork-Shiley valves were available for follow-up. The incidence of thrombosis for the plano-convex model was 1.

Thrombosis of Björk-Shiley valve prostheses. Evaluation by cineradiography.

Cineradiography is the most accurate and rapid method in evaluation of the function of Björk-Shiley prosthetic valves manufactured after late 1975 and which incorporate a tantalum foil hoop into the disc. This helps in demonstration of the disc and in the calculation of the opening angle of the disc. In the present series 8 cases with valve dysfunction have been correctly diagnosed by conventional cineradiography, 7 in the mitral and one in the aortic position.