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European Heart Journal 1986 7(4):353-356;
Copyright © 1986 by the European Society of Cardiology.
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© 1986 The European Society of Cardiology

Doppler echocardiographic characteristics of the Carpentier-Edwards xenograft

J. L. GIBBS, G. A. WHARTON and G. J. WILLIAMS

Non Invasive Heart Unit, Killingbeck Hospital Leeds, UK

Received 22 August 1985; revised 21 October 1985; .

Requests for reprints to: Dr J. L. Gibbs, The Non Invasive Heart Unit, Killingbeck Hospital, York Road, Leeds, West Yorkshire LS14 6UQ. Tel: Leeds 648164 Ext 369.

Abstract

In order to define ranges of normal velocities for the Carpentier-Edwards xenograft, 38 mitral, 24 aortic and 9 tricuspidprostheses were studied with pulsed or continuous wave Doppler at a mean interval of 38 months following surgery. All patients had clinically normal prosthetic valve function and no clinical or radiographic signs of heart failure. Mean peak velocity across aortic prostheses was 244 cm s–1 (SD 48). There was weak correlation (r = 0.54, P < 0.01) between peak velocity and time since valve implantation, but no significant difference in peak velocity across valves of different size. In the mitral position, mean peak velocity was 164 cm s–1 (SD 24) and mean pressure half time 90 ms (SD 23). There was again no significant difference between valves of different size. There was a weak correlation between pressure half time and time since implantation (r = 0.44, P <0.01), but there was no relationship between the latter and peak velocity. In the tricuspid position, mean peak velocity was 150 cm s–1 (SD 12) and mean pressure half time 163 ms (SD 50). The Doppler indices of obstruction to blood flow for prostheses in the mitral and aortic positions showed a significant increase with time after implantation.

Key Words: Carpentier-Edwards bioprosthesis • Doppler echocardiography • peak velocity • pressure half time


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