Echocardiographic assessment of the subaortic root after implantation of high or low profile mitral prostheses.
In order to evaluate the influence of the profile of mitral prostheses on the outflow tract of the left ventricle, 99 patients underwent M-Mode echocardiography before and after surgery. In 67 cases high profile mitral prostheses had been implanted (48 mechanical and 19 biological); in 32 cases low profile mitral prostheses had been implanted (22 mechanical, 10 biological). Echocardiography showed that the implantation of high profile mitral prostheses did not induce changes of left ventricular diastolic and systolic dimensions ( EDDLV and ESDLV ) while induced significant reduction of left ventricular outflow tract (LVOT) dimension and LVOT/ EDDLV index with subsequent changes in transaortic flow. On the other hand, low profile prostheses did not induce significant changes of left ventricular dimensions, LVOT and LVOT/ EDDLV index. Finally, low profile biological mitral valve prostheses ( Liotta type) induced a significant increase of post-operative dimension of LVOT and LVOT/ EDDLV index. Authors conclude: that the implantation of high profile mitral prostheses changes LVOT dimension and transaortic flow and, that M-Mode echocardiography is a reliable technique to point out these changes.
D000328:Adult; D001011:Aorta / Q000473:pathology* / Q000503:physiopathology; D001705:Bioprosthesis; D002306:Cardiac Volume; D004452:Echocardiography; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis / Q000379:methods; D006352:Heart Ventricles / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery*; D008946:Mitral Valve Stenosis / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D009200:Myocardial Contraction