Background and Objective: Since the first documented description of CAVCD repair by Lillehei and colleagues in1954, various techniques have been proposed for its repair. However, the ideal timing for the repair remains controversial. Many authors now advocate primary repair at the age of six months or earlier before the onset of irreversible pulmonary hypertension especially in the presence of Down’s syndrome. The aim of this work is to evaluate the results of early total repair of CAVCD before six months of age with the hypothesis that, with modern techniques, the current risks of CAVSD repair in children younger than 6 months and those older than 6 months are equal.Patients & Methods: 20 patients (11 females 9 males) below 6 months of age with isolated CAVC (study group) who underwent primary total repair were included. Another group of 20 patients (12 females & 8 males) with CAVC who underwent repair above the age of 6 months were also selected for comparison (control group). The mean age in each group was 5.3+0.49 & 12+ 8.5months respectively while the mean body weight was 4.7 + 0.45 & 9+ 2.5 Kg respectively. Down syndrome was present in 9 patients of the study group (45%) and in 10 patients (50%) of the control group.Results: There was no statistical difference in intra-operative and postoperative data between both groups, apart from: the duration of mechanical ventilation which was longer in the control group (48 + 20 hours) than in the study group (36 + 15 hours) and the incidence of recurrent postoperative pulmonary hypertensive crises which was higher in the control group (8 patients) than in the study group (4 patients).On the other hand the durations of ICU & hospital stay were higher in the study group (5+1 &10+ 1.5 days respectively) than in the control group (4+0.88 &9+ 1.27days respectively. . Conclusion: We concluded that with modern techniques, the current risk factors for CAVSD repair in patients younger than 6 months and in those older than 6 months are equal.