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  • Title: Dynamic left-ventricular tract outflow obstruction: a late complication of mitral valve replacement.
    Author: Bolognesi R, Tsialtas D, Manca C.
    Journal: Cardiology; 1990; 77(6):466-71. PubMed ID: 2073663.
    Abstract:
    The case presented is a 47-year-old woman with left-ventricular outflow tract obstruction which was the late complication of mitral valve replacement (4 years later). The diagnosis was made using two-dimensional Doppler echocardiography (echo-2D Doppler) and confirmed by cardiac catheterization. Protrusion of the prosthetic ring towards the intraventricular septum reducing the diameter of the outflow tract to 7-8 mm and creating a dynamic obstruction (30 mm Hg on cardiac catheterization, and 44 and 75 mm Hg on echo-2D Doppler basally and after isoamyl nitrite inhalation, respectively) was recorded. The echo-2D Doppler technique appears to be useful in detecting this postsurgical mitral complication.
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