Introduction. Arterial hypertension is one of the worst predictors after surgical repair of aortic coarctation (ACo). Knowing the likelihood of hypertension development depending on age of primary repair is useful for long-term surveillance and counseling. Aim of the study. Studying the impact of arterial hypertension (AH) on aorta geometry after surgical repair of ACo in children.Materials and methods. The research included 49 children with ACo operated with different remaining pressure gradients. Respondents were examined by transthoracic echocardiography. Outpatient blood pressure monitoring was performed with the TA Holter for 24 hours. All the children included in the research were computed for the Z score for aortic dilatation. Results. In 34.69% of cases with children with AC operated and with a pre-existing gradient, AH values at 24h> 90 percentile monitoring, 65.3% TA ≤ 75 percentile (AH based on age and height). Percentage of time was over. 30.61% of respondents had aortic diameters increased in height and body surface area (Z score). Conclusions. ACo is part of congenital aortic disease (CAD), often debilitating, resulting in AH and with a poor progression. Dilation of the aorta is a severe and irreversible complication within ACo, in combination with HTA.