Abstract
Preoperative two-dimensional echocardiograms (2D-ECHOs) were done on 18 patients to determine the accuracy of assessing the mitral and aortic anulus diameter in children undergoing valve replacement. Fourteen patients underwent primary valve replacement and four underwent repeat valve replacement. The mean age was 11.5 years (range 2 to 17 years). The 2D-ECHO measured mitral or aortic valve anulus was compared with the external diameter of the largest prosthetic valve that could be inserted. There was a strong correlation ( r = 0.99, p < 0.001, SEE = 1.0 mm) between the 2D-ECHO measurements and the prosthetic valve size in patients undergoing primary valve replacement, but the correlation ( r = 0.16, p = NS) was poor for those undergoing repeat valve replacement. In conclusion, 2D-ECHO prediction of prosthetic mitral and aortic valve size is accurate in children undergoing primary valve replacement but is poor in those undergoing repeat valve replacement.
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