Stability of the BSCC heart valve outlet strut resonant frequency under changing physiological conditions and observation times
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A Knowledge Engineering System for MEDAS p. 6 Knowledge Acquisition for Computer-Based Medical Expert Systems p. 12 A Complete, Hypermedia Medical Decision Analysis Support System p. 16 3-D Motion Estimation Algorithms Using 4-D Data p. 22 Edge Detection in Gated Cardiac Nuclear Medicine Images p. 28 Edge Detection Using the Local Fractal Dimension p. 34 Model-Based Analysis of Cardiac Motion from Tagged MRI Data p. 40 Need for a National Drug Utilization Review (DUR) Criteria Knowledgebase p. 46 Finite Element Analysis of Vibrations of the Bjork-Shiley Convexo-Concave Heart Valve p. 48
منابع مشابه
Decision guidelines for prophylactic replacement of Björk-Shiley convexo-concave heart valves: impact on clinical practice.
BACKGROUND Because of risk of outlet strut fracture, prophylactic replacement should be considered for Björk-Shiley convexo-concave (BScc) valve recipients. We assessed the effects of epidemiological and decision-analytic guidelines on actual BScc valve replacement. METHODS AND RESULTS We performed a retrospective cohort study including all 2263 Dutch BScc patients with a mean follow-up of 11...
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This paper describes the use of two simple electromagnetic methods for detecting strut fractures in prosthetic heart valves. The first method involves immersing the heart valve in a uniform time varying electromagnetic field and measuring the perturbation of the field in regions proximate to the strut. In vitro tests done to date indicate that the method is capable of discriminating between int...
متن کاملStrut fracture of Björk-Shiley convexo-concave valve in Japan--risk of small valve size--.
BACKGROUND The Björk-Shiley convexo-concave (BSCC) prosthetic valve was introduced in 1979. Between 1979 and 1986, approximately 86,000 BSCC valves were implanted. By December 31, 1994, 564 complete strut fractures had been reported to the manufacture. We experienced a case of an outlet strut fracture and investigated the risk of BSCC prosthetic valve fractures in Japan. METHODS AND RESULTS T...
متن کاملFatigue Evaluation of a Prosthetic Heart Valve
Approximately 86,000 Björk-Shiley convexo-concave (BSCC) heart valves were implanted from 1979 to 1984 and approximately 1% of these valves experienced failure due to fatigue of a critical valve component. Failures of this type are likely to yield a 70% mortality rate in patients. Although the BSCC valve was constructed from a material that possesses good fatigue properties continued operation ...
متن کاملOutlet strut fracture of Björk-Shiley convexo concave heart valves: the UK cohort study.
OBJECTIVE To investigate the risk of outlet strut fracture (OSF) in Björk-Shiley convexo concave (BSCC) valves in relation to patients' clinical and valve characteristics. DESIGN A cohort of 2977 patients with 3325 valves with a follow up of 18 years. SETTING 38 cardiac implantation centres in the UK. RESULTS 56 OSF events were reported with 43 occurring in mitral and 13 in aortic valves....
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تاریخ انتشار 1994