Objective:To summarize the experience of complete repair of tetralogy of Fallot in infants and young children.Method:A retrospective review of one-stage repair of tetralogy of Fallot(TOF)performed in 87 consecutive patients no more than 3 years old was made.Follow-ups were obtained from clinic appointments.The patients were divided into three groups according to age at surgery:group A(<3 months

11cases)

group B(3-12 months

32 cases)

group C(12-36 months

44 cases).Results:The early postoperative mortali- ty was 4.6%(4/87).Postoperative lung complications were observed in 12 cases

residual RVOTO(>30mmHg)in 3 cases

residual VSD in 3 cases

low cardiac output syndrome in 6 patients.There were no late death and reoperation during follow-up period of 1 to 78 months (36±27 months).74(90.2%)patients were in NewYork Heart Association(NYHA)functional class I

and the other 9(10.8%)were in class II.Group A had significantly longer ventilation

ICU stay and inotropic support time than group B and group C.A slight increase in the incidence of PR

RVOTO in group C.Conclusion:Early one-stage repair of TOF in patients in infants and young children has a low operative mortality and can provide excellent asymptomatic mid-term survival

and the optimal age for elective repair of TOF is 3 to 12 months of age.