Valve prostheses of mitral position in children
Shimoyama, Y.; Wanibuchi, Y.; Ino, T.; Terada, Y.; Takagi, H.; Furuta, S.; Imamura, H.; Takeuchi, S.; Shimizu, H.; Inoue, T.
Nihon Kyobu Geka Gakkai 38(1): 101-105
1990
ISSN/ISBN: 0369-4739 PMID: 2329286 Document Number: 352827
Twenty children less than 15 years old of age who had undergone mitral (left-sided atrioventricular) valve replacement before August 1983 have been followed up until October 1988. Fourteen biological valves (B-group) and seventeen mechanical valves (M-group) were used in them. Preoperative conditions had been similar between B- and M-groups. For the B-group, there were one operative death and two late deaths. For the M-group there were no operative death and three late deaths. An actuarial survival rate at ten years was 53.5 +/- 23.3% for the B-group and 85.7 +/- 9.4% for the M-group (not significant). All biological valves were calcified and failed in 27 to 89 months. Three mechanical valves caused thrombosis. There was no other complication for both groups. An event free rate was 0% at eight years for the B-group, however it was 70.6 +/- 11.0% at ten years for the M-group (p less than 0.025). Our data indicates that the mechanical valve is more suitable than the biological valve for children.