Assessment of normal and abnormal prosthetic mitral valves by Doppler echocardiography Doppler in prosthetic mitral valves |
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Authors: | Gilbert Habib Michel Benichou Jean-Louis Bonnet Philippe Jau Jacques Bille Pierre Djiane and Roger Luccioni |
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Institution: | (1) Department of Cardiology, LA TIMONE Hospital, Marseille, France;(2) Service de Cardiologie B, C.H.U. Timone, 27 Boulevard Jean Moulin, 13385 Marseille, Cedex 5, France |
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Abstract: | Pulsed, continuous-wave, and color Doppler were performed in 165 normal mitral prostheses and 58 patients with prosthetic dysfunction (46 regurgitant and 12 obstructive valves) proved by catheterization and/or surgery. Mean mitral gradient (MG) and pressure half-time (PHT) were determined in all cases.Among normal prostheses, a wide range of both MG and PHT was observed in each type of valve and a considerable overlap between valves of different size. St-Jude's valve had the most optimal hemodynamics. Mild mitral insufficiency was detected in 14% of tissue and 24% of mechanical mitral valves.Repeat studies were performed in 30 patients over a 2.4 years period. Nine patients developed Doppler evidence of new prosthetic dysfunction, while Doppler parameters remained unchanged in 21 patients during the follow-up period.Among malfunctioning valves, Doppler correctly identified all cases of prosthetic obstruction (n=12), and 42 of 46 regurgitant valves.We conclude that Doppler echocardiography is a very useful technique in both non-invasive assessment and follow-up of normal prosthetic valves in the mitral position and in detecting prosthetic dysfunction, especially when prosthetic obstruction is present. |
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Keywords: | doppler echocardiography prosthetic mitral valves malfunctioning mitral prostheses follow-up of mitral prostheses |
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