[Mitral and aortic regurgitation: a rare association in ankylosing spondylitis (author's transl)].

The occurrence of mitral regurgitation in ankylitis is very unusual. The case reported herein is a remarkable one because the subaortic bump at the base of the anterior mitral leaflet, the mose characteristic aspect of the heart involvement in this disease, was visualized for the first time by echocardiography. Moreover, the prolapse of the mitral leaflets was documented; it allows for a new understanding as far as the mechanism of the regurgitation is concerned.