Detecting broken struts of a Björk-Shiley heart valve using ultrasound: a feasibility study

Ultrasound in Medicine & Biology
P L M J van NeerN de Jong

Abstract

The Björk-Shiley (BScc) mechanical heart valve has extensively been used in surgery from 1979 to 1986. There is, compared with equivalent valve types, increased occurrence of unexpected mechanical failure of the outlet strut of the valve, with a high incidence of mortality, when it occurs. Many approaches have been attempted to noninvasively determine BScc valve integrity. None of the approaches resulted in adequate assessment, mostly due to a lack of either sensitivity or specificity demonstrated in in vitro and/or in vivo studies. In our study we analyze leg movement of the BScc valves outlet strut during the cardiac cycle with ultrasound. For a broken strut, the movement of both legs will be significantly different, whereas the difference will be negligible for an intact strut. BScc valves were mounted in the mitral position in an in vitro pulse duplicator system. A focused single-element transducer was used to direct ultrasound on a leg of the outlet strut. Correlation-based time delay estimation was used to estimate differences in time of flight of the outlet strut echoes to determine outlet strut leg movement. The movement of an intact valve and a valve with a single-leg fracture with both ends grating against each other ...Continue Reading

References

Aug 17, 1995·The New England Journal of Medicine·W W O'NeillK C Beatty
Aug 8, 1996·The New England Journal of Medicine·W VongpatanasinR A Lange
Jun 1, 2001·The Journal of Thoracic and Cardiovascular Surgery·R Z OmarK M Taylor
Jan 18, 2005·Ultrasound in Medicine & Biology·E VlaanderenN De Jong

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Citations

Jan 1, 2019·Journal of Cardiac Surgery·Gijs G J van SteenbergenWim J Morshuis

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