%0 Journal Article %T Modern cardiosurgicaltreatment by acquired valvular disease by elderly and senile patients %A Isaeva, E.S. %K heart surgery, heart valve, cardiac surgery, mitral valve, aortic valve, tricuspid valve, prolapse. %J Journal of Natural Sciences Research %D 2017 %N 2 %P 5 %I INFRA-M Academic Publishing LLC.