The purpose of this study was to report our experience with 120 prosth
etic valves implanted in 105 patients over an 8-year period. Their pre
operative status was compared at an average follow-up period of 4 year
s (range 1 to 6 years) with the postoperative results, We conclude tha
t the Mexican-made valves (Biomed) meet the highest international qual
ity standards: they are well tolerated by the patients; their performa
nce is excellent and no postoperative dysfunction of the valves was ev
er detected, The few complications observed were no different from tho
se reported for foreign ball-caged valves, Finally, most of our patien
ts showed a marked improvement postoperatively.