Weight is an important indicator in the treatment of precardiac disease, and 8 kg is a hurdle. Children who are too small are less able to tolerate surgical blows and extracorporeal circulation. Small weight is a test of surgical technique. If the usual good with try to be bigger to do is good. But this sick child usually always feels Chang fever is too bad to bring up, the whole family daily worry a lot, how careful is also three days two sick, this operation will completely change the life of the whole family. The child is free from the shadow of death, and grows up like other normal children. Happy life.