Ultrasonic assessment of the St. Jude prosthetic valve: M mode, two-dimensional, and Doppler echocardiography.
- 1 November 1983
- journal article
- research article
- Published by Wolters Kluwer Health in Circulation
- Vol. 68 (5) , 897-905
- https://doi.org/10.1161/01.cir.68.5.897
Abstract
To determine whether the flow characteristics of aortic and mitral St. Jude Medical valves could be defined noninvasively, we analyzed Doppler transprosthetic flow velocity spectra in 23 relatively asymptomatic patients. Results were interpreted in the framework of M mode and two-dimensional echocardiographic data and were compared with Doppler transvalvular flow velocity spectra from native valves of healthy subjects. Although the morphologic characteristics of Doppler spectra were similar, peak and mean transprosthetic mitral flow velocities were higher than values obtained across native valves (1.38 +/- 0.3 m/sec and 0.73 +/- 0.1 m/sec vs 0.78 +/- 0.1 m/sec and 0.35 +/- 0.06 m/sec, respectively; p less than .001). However, calculated pressure half-times were not different (61.2 +/- 16.9 msec vs 57.2 +/- 13.2 msec; p greater than .05) and calculated transprosthetic mitral gradients were small (2.3 +/- 0.9 mm Hg). Similarly, the morphologic characteristics of aortic Doppler flow spectra in St. Jude and native valves were analogous. However, prosthetic valves exhibited higher peak and mean velocities (p less than .01) and slightly prolonged time-to-peak flow (p = .02). M mode and two-dimensional studies did not show useful quantitative measures of prosthetic function and did not demonstrate evidence of paravalvular leaks, which were detected in four cases by Doppler techniques. Thus Doppler echocardiography provides quantitative information about transprosthetic flow characteristics in patients with implanted St. Jude valves and is useful in identifying patients with prosthetic dysfunction.This publication has 9 references indexed in Scilit:
- Evaluation of pulmonary and systemic blood flow by 2-dimensional Doppler echocardiography using fast fourier transform spectral analysisThe American Journal of Cardiology, 1982
- Echocardiographic Evaluation of the St. Jude Medical Prosthetic ValveChest, 1981
- Assessment of pulsed Doppler echocardiography in detection and quantification of aortic and mitral regurgitation.Heart, 1980
- Non-invasive assessment of aortic stenosis by Doppler ultrasound.Heart, 1980
- Noninvasive assessment of atrioventricular pressure half-time by Doppler ultrasound.Circulation, 1979
- An ultrasound Doppler technique for the noninvasive determination of the pressure gradient in the Björk-Shiley mitral valve.Circulation, 1979
- Noninvasive assessment of pressure drop in mitral stenosis by Doppler ultrasound.Heart, 1978
- Evaluation of Obstructive Characteristics of Mitral Disc Valve Implants with Ultrasound Doppler TechniquesActa Medica Scandinavica, 1977